<正> A proper landing posture is significant to the reduction of both the im-pact force acting on the human body and the injury at landing.In this paper theimpact force acting on human feet is studied.The subjects were 3 maleparachuters.The experiments were performed by means of high-speed photography and amotor analyzer.The experimental results are as follows:（1）When the subjectjumped from two platforms 1.0m and 1.5m in height

a vertical impact force onthe feet in half-squat posture was larger than in side spin posture.（2）When thesubject jumped from the platform 1.0m high

the feet gained a horizontal impactforce in the half-squat posture

larger than in the side spin posture.When thesubject jumped from the platform 1.5m high

the horizontal impact force pro-duced by both of the above-mentioned postures were just the same

which needsfurther research.（3）In terms of reducing the impact force acting on the feet

theside spin posture is better than the half-squat posture.