Planetary gear transmission differential

Disclosed is a planetary gear transmission differential which is characterized in that a first input gear is arranged on a first input shaft; a second input shaft is rotationally connected inside an input hollow shaft on a planetary carrier; an output shaft is rotationally connected inside an output hollow shaft on the planetary carrier; the input hollow shaft and the output hollow shaft are rotationally integrally connected with a casing body; the second input shaft and the output shaft are arranged on one straight line; an input sun gear on the second input shaft is opposite to an output sun gear on the output shaft; the input sun gear meshes with input planetary gears; the output sun gear meshes with output planetary gears; the input planetary gears and the output planetary gears are fixedly connected on the same planetary gear shaft; two output planetary gears are evenly distributed on the periphery of the output sun gear; two input planetary gears are evenly distributed on the periphery of the input sun gear; the planetary carrier comprises large gears and half planetary carriers fixedly integrally connected with the large gears; one end of the planetary gear shaft is rotationally connected with the half planetary carriers; and the other end of the planetary gear shaft is rotationally connected with the large gears.