For a civil transport helicopter, the acquisition of type certificate shall follow requirements specified in CCAR29, among which CAT-A performance is a typical feature of transport helicopter, meanwhile CAT-A performance flight test is the best way to verify its conformity. Based on the relative CAT-A performance airworthiness documents issued by CAAC, this paper analyses the background of CAT-A take-off performance, researches relative clause requirements and compliance method, discusses flight test techniques concerning H-V domain、CAT-A take-off flight path、CAT-A continued take-off、rejected take-off、 and the determination of final take-off decision point, making CAT-A performance take-off decision point flight test risk management and control measures for clear runway. The CAT-A performance take-off decision point flight test method specified in this paper has effectively instructed the CAAC certification flight test toward AC312E, AC313, laying a sound foundation for the fore said helicopters to acquire CAAC type certificates. Research of this paper could provide referential value to CAAC test pilots as well as reference to applicant test pilot.