The invention discloses a buffering mechanism for driven turnover of a planetary gear wheel set. The mechanism comprises a control arm and a support connecting piece, wherein the control arm is fixedly arranged on a frame, and the support connecting piece is fixedly connected with a planetary gear support. The control arm is fixedly provided with a spring buffer positioning piece and a spring buffer assembly, wherein the spring buffer assembly is located on the periphery of the spring buffer positioning piece. The support connecting piece is provided with a baffle and is embedded with a rotaryplatform transition plate, wherein one side of the rotary platform transition plate is fixedly connected with the spring buffer positioning piece, the other side of the rotary platform transition plate is rotationally connected with the planetary gear support, and the rotary platform transition plate is sleeved with a rotary platform. The interior of the spring buffer positioning piece is movablyprovided with a wheel hub motor flange shaft, wherein the wheel hub motor flange shaft is provided with a coupling, the planetary gear support is fixedly provided with a planetary gear shaft, and thecoupling penetrates the rotary platform transition plate so as to be connected with the planetary gear shaft. The buffering mechanism for driven turnover of the planetary gear wheel set has good buffering effect, and specifically, when a planetary gear is turned over, instant impact force generated when wheels contact the ground can be reduced, thus being capable of effectively prolonging the service life of a shaft, a gear and other components.