The invention discloses a 360-degree large part turnover device and a working method thereof. The 360-degree large part turnover device is composed of a rotary motor, a belt wheel, a material to be turned over, a turnover rotor, a turnover rotary shaft, supporting side plates and a controller. The number of the supporting side plates is two, and the rotary motor and the controller are arranged on the two sides of the bottom ends of the supporting side plates correspondingly. The belt wheel is connected to the rotary motor and fixedly connected with the supporting side plates. The turnover rotary shaft is arranged at the tops of the supporting side plates and penetrates the supporting side plates. The turnover rotor is arranged on the turnover rotary shaft. The material to be turned over is located in the turnover rotor. The 360-degree large part turnover device is large in turnover angle, stable in structure and easy to operate, the turnover work of parts is achieved conveniently and safely in a labor saving manner, and the defects of bumping, scratching and the like caused during manual operation are effectively avoided. The device achieves multiple purposes, the production efficiency is improved, and the labor intensity of operators is reduced.