Cover	6 Months Ended
Mar. 31, 2025
Cover [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Mar. 31, 2025
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2025
Current Fiscal Year End Date	--09-30
Entity File Number	001-42683
Entity Registrant Name	Julong Holding Limited
Entity Central Index Key	0002007846
Entity Address, Address Line One	Room 2009, Building A
Entity Address, Address Line Two	Times Fortune World
Entity Address, Address Line Three	No.1 Hangfeng Road, Fengtai District
Entity Address, City or Town	Beijing
Entity Address, Country	CN
Entity Address, Postal Zip Code	100070

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

No definition available.

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- Definition

Cover page.

+ References

No definition available.

+ Details

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- Definition

End date of current fiscal year in the format --MM-DD.

+ References

No definition available.

+ Details

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- Definition

Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.

+ References

No definition available.

+ Details

Name:	dei_DocumentFiscalPeriodFocus
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Period Type:	duration

- Definition

This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

+ References

No definition available.

+ Details

Name:	dei_DocumentFiscalYearFocus
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- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:	dei_DocumentPeriodEndDate
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Period Type:	duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:	dei_DocumentType
Namespace Prefix:	dei_
Data Type:	dei:submissionTypeItemType
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- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

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- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

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Data Type:	xbrli:normalizedStringItemType
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- Definition

Address Line 3 such as an Office Park

+ References

No definition available.

+ Details

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Namespace Prefix:	dei_
Data Type:	xbrli:normalizedStringItemType
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- Definition

Name of the City or Town

+ References

No definition available.

+ Details

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Data Type:	xbrli:normalizedStringItemType
Balance Type:	na
Period Type:	duration

- Definition

ISO 3166-1 alpha-2 country code.

+ References

No definition available.

+ Details

Name:	dei_EntityAddressCountry
Namespace Prefix:	dei_
Data Type:	dei:countryCodeItemType
Balance Type:	na
Period Type:	duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

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Data Type:	xbrli:normalizedStringItemType
Balance Type:	na
Period Type:	duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

+ Details

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- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:	dei_EntityFileNumber
Namespace Prefix:	dei_
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Balance Type:	na
Period Type:	duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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