The invention provides a waterproof new energy vehicle motor based on stable output. The waterproof new energy vehicle motor comprises a motor body, a motor front end shell, a motor rear end shell, amotor shell, a seam waterproof mechanism for preventing water from entering the motor front end shell and the motor rear end shell and a shell water guide and heat dissipation mechanism for large-areacooling and waterproofing. The motor front end shell and the motor rear end shell are fixedly connected at the front and rear ends of the motor shell respectively. The motor body is fixedly installedinside the motor shell. The invention relates to the field of new energy. According to the waterproof new energy vehicle motor based on stable output, cooling is performed by the wind force is generated by utilizing the bump in the driving process of the vehicle with the help of rain and wind; meanwhile, the gap is additionally arranged to improve the heat dissipation effect while being waterproof so that the problems of damage to the motor and influence on the stable output of the motor caused by lead winding at the motor end cover used by the general new energy vehicle, the expansion of theend cover caused by heat accumulation and rainwater infiltration into the motor in rainy days can be effectively solved.