Abstract: A gear shifting mechanism for vehicle automatic transmission, including a housing, a spline shaft installed in the housing, an axial position sensor and a radial rotary position sensor installed on the spline shaft, a shift finger connected with the spline shaft through a spline, a gear selecting device and a gear shifting device respectively selected and shifted a gear through the shift finger. The gear selecting device utilizes a gear selecting proportional electromagnet for moving the shift finger, and controls the automatic gear shift by adjusting the current. The gear selecting device utilizes restoring springs, and the restoring springs are multiple levels disposed.