Powder coating mixing kettle

The utility model discloses a powder coating mixing kettle which comprises a mounting frame, a bearing seat, a bearing, a rotating shaft and an inner driving motor, wherein the inner driving motor is locked on the outer side of the mounting frame; the stirring barrel sleeves the outer wall of the rotating shaft, a helical ribbon is welded outside the part, located on the stirring barrel, of the rotating shaft, the helical ribbon rotates in a manner of being attached to the inner wall of the stirring barrel along with rotation of the rotating shaft, a mounting plate is locked and fixed on the outer wall of the stirring barrel, and a feeding and discharging port is formed in the mounting plate; the external driving motor is arranged at the lower end of the stirring barrel and drives the stirring barrel to rotate when rotating; the retarding structure is mounted at the lower end of the mixing drum in a lifting manner, is deviated from the external driving motor, and is clung to the outer wall of the mixing drum