Abstract: As train raises its speed, the requirement of dynamic vision apperceptive ability for trainman cannot be ignored. The dynamic sights of 158 subjects were measured. Results show that there exist considerable differences in dynamic sights among the trainmen who have similar static sights, that the static sight cannot completely reflect the dynamic vision apperceptive ability, and that both the dynamic and static visions are important indexes for trainmen that cannot be neglected. It is further proposed that the safety threshold value of dynamic vision apperceptive ability is greater than 0.5. At the same time, a system for evaluation and measurement of dynamic apperceptive ability is worked out.