Double helix blade mixing device

The utility model discloses a double helix blade mixing device. The device comprises a mixing barrel, an external helical blade, and an internal helical blade, wherein the outside of the mixing barrel is provided with a frame body for supporting, a barrel head is arranged on the mixing barrel, a motor is arranged on the barrel head, a mixing shaft driven by the motor is arranged in the mixing barrel, the bottom of the mixing shaft is arranged in a shaft sleeve at the bottom of the mixing barrel, the shaft sleeve is connected with the side wall of the mixing barrel through a shaft sleeve bracket, the mixing shaft is respectively connected with the external helical blade and the internal helical blade through a blade bracket, the helical direction of the external helical blade is opposite to that of the internal helical blade, the outside of the mixing barrel above the frame body is connected with a feed pipe, and the bottom of the mixing barrel is provided with a discharge valve. Since the rotary mixing directions of the external helical blade and the internal helical blade are opposite, the material in the mixing barrel is circularly mixed, and the mixing is more uniform.