In view of the judging difficulties in hanging and releasing short-light liner in ultra-deep well, analysis has been carried out on the key technique of hanging and releasing in short-light liner operation.Based on the practice of short-light liner cementing in the ultra-deep well of Tahe Oilfield, the theory analysis and experience summary were carried out, and the category of short-light liner was proposed, and the influencing factors of top-lift were introduced.In this paper, a series of technical solutions are formed such as the lift-hanging and press-releasing, theoretical calculation of measured tracking as a means, and multi-angle verification as a guarantee.The data of the short-light liner in ultra-deep well is analyzed and standardized.Field application shows that the method has the advantage of easy operation and low risk,which provides technical support for short-light liner work,and guidance for ultradeep,complex for mation of oil-gas development and is worth further optimization and application.