The invention relates to a lubricating oil stirrer, which comprises a tank body, wherein a feeding opening is formed in the upper part of the tank body; a discharge opening is formed in the lower part of the tank body; landing legs are arranged at the lower part of the tank body; a motor is arranged at the upper part of the tank body and is connected with a shaft; a paddle for stirring lubricating oil is arranged on the shaft; the lower end of the shaft and the bottom of the tank body are positioned; a fixed end is arranged at the bottom of the tank body; the shaft is connected with the fixed end through a bearing; the paddle arranged on the shaft comprises a paddle A and a paddle B; the paddle A is arranged at the middle end of the shaft; the paddle B is arranged at the lower end of the shaft; the paddle A is in a paddle form; the paddle B is in a downward anchor form; a jacket is arranged outside the tank body; a jacket inlet and a jacket outlet are formed in the jacket; and a manhole is formed in the tank body. The lubricating oil stirrer is used for stirring basic oil and an additive of the lubricating oil; and a positioned end which is fixed with the shaft is arranged at the bottom of the tank body, so that vibration or whipping when the shaft automatically rotates is reduced.