对我国优秀女子标枪运动员最后用力过程中左腿的动作技术进行了定量研究。结果表明：交叉步右脚着地后，左膝水平速度与重心水平速度显著相关（γ＝０．７３０２，Ｐ＜０．０１），加速左腿的前摆有助于重心水平速度的回升；影响标枪出手速度的灰色关联排序中首要因素是标枪离手时左膝角，说明左腿迅速而充分的蹬伸对出手速度起着重要的影响作用。 The quantitative research on the movement technique of the left leg during the final exertion of excellent female javelin thrower in China is carried out. The results showed that the horizontal velocity of left knee was significantly correlated with the horizontal velocity of the center of gravity (γ = 0.7302, P <0.01) after cross-stepping on the right foot. Acceleration of the anterior pendulum of the left leg was helpful for the recovery of the horizontal velocity of the center of gravity. The primary factor in the gray relevancy ranking of the javelin throw speed is the left knee angle when the javelin leaves the hand, indicating that rapid and sufficient stretch of the left leg plays an important role in the speed of the shot.