This paper adopts the Arial three-dimensional analysis system to trim and calculate the video of the national championship and compare the data. The conclusion is: the release angle and release height of athletes in China and abroad is appropriately the same， but the release velocity of athletes in our nation is slower than foreign elites'； Zhang Jun's left knee angle at release phase is small， power position is not good； The trajectory of CG shows Zhang Jun's CG moving to right side of putting circle at delivery phase.