Document And Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2022	Oct. 13, 2022	Dec. 31, 2021
Document Information Line Items
Entity Registrant Name	LONGDUODUO COMPANY LIMITED
Document Type	10-K
Current Fiscal Year End Date	--06-30
Entity Common Stock, Shares Outstanding		300,000,000
Entity Public Float			$ 0
Amendment Flag	false
Entity Central Index Key	0001892316
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Annual Report	true
Document Transition Report	false
Entity File Number	333-260951
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	37-2018431
Entity Address, Address Line One	419, Floor 4, Comprehensive Building
Entity Address, Address Line Two	Second Light Hospital, Ordos Street
Entity Address, City or Town	Inner Mongolia
Entity Address, Country	CN
City Area Code	+86
Local Phone Number	(0472) 510 4980
Entity Address, Postal Zip Code	0472
Entity Interactive Data Current	Yes
Auditor Firm ID	2851
Auditor Name	KCCW Accountancy Corp.
Auditor Location	California