Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Aug. 14, 2023
Document Information Line Items
Entity Registrant Name	Cactus Acquisition Corp. 1 Ltd.
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001865861
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jun. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	true
Entity Ex Transition Period	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-40981
Entity Incorporation, State or Country Code	E9
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	4B Cedar Brook Drive
Entity Address, City or Town	Cranbury
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08512
City Area Code	(609)
Local Phone Number	495-2222
Entity Interactive Data Current	Yes
Class A ordinary shares, par value $0.0001 per share
Document Information Line Items
Trading Symbol	CCTS
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Security Exchange Name	NASDAQ
Redeemable warrants, each warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Document Information Line Items
Trading Symbol	CCTSW
Title of 12(b) Security	Redeemable warrants, each warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Security Exchange Name	NASDAQ
Units, each consisting of one Class A ordinary share and one-half of a redeemable warrant
Document Information Line Items
Trading Symbol	CCTSU
Title of 12(b) Security	Units, each consisting of one Class A ordinary share and one-half of a redeemable warrant
Security Exchange Name	NASDAQ
Class A ordinary shares
Document Information Line Items
Entity Common Stock, Shares Outstanding		2,260,351
Class B Ordinary Shares
Document Information Line Items
Entity Common Stock, Shares Outstanding		3,162,500