High-speed planetary gear box of electric automobile

The invention provides a high-speed planetary gearbox of an electric automobile, and relates to the technical field of transmission. The planet carrier comprises a front side plate, a connecting piece and a rear side plate which are sequentially connected, the front side plate is used for positioning the sun gear, and the rear side plate is used for outputting torque; the side, away from the front side plate, of the rear side plate is provided with an annular flange distributed around the axis of the planet carrier, the oil collecting baffle is connected with the annular flange, and the oil collecting baffle protrudes out of the side, close to the axis of the planet carrier, of the annular flange so that an oil collecting groove can be jointly defined by the oil collecting baffle and the rear side plate. According to the gear box provided by the embodiment, the groove is formed in the planet carrier, the groove is matched with the oil collecting baffle to form the oil collecting groove, a concave part does no