The invention discloses an improved structure of a liquid stirring device. The improved structure comprises a fixing frame. A tank is arranged on the fixing frame, a discharging pipe is arranged at the bottom of the tank and provided with a valve, a motor is arranged at the top end of the tank, the power output end of the motor is connected with a rotating shaft, the rotating shaft is arranged in the tank and connected with a cylinder through a connecting rod, an annular empty space is formed between the rotating shaft and the cylinder and provided with a feeding port, stirring blades are arranged on the outer wall of the cylinder, and a plurality of inclined plates are arranged on the inner wall of the cylinder and the outer wall of the rotating shaft. According to the improved structure of the liquid stirring device, liquid is injected into the annular empty space formed between the rotating shaft and the cylinder, the inclined plates used for blocking flowing of liquid are arranged in the annular empty space, and the speed of the liquid entering the bottom of the tank through the feeding port is decreased under the action of the inclined plates, so that the impact action on the bottom of the tank by the liquid is weakened, and the problem that the bottom of the tank is deformed and damaged due to the impact force is solved.