The invention discloses a reaction kettle for producing lubricating grease. The reaction kettle comprises a reaction kettle body, wherein a machine box is arranged at the top of the reaction kettle body; a motor is arranged in the machine box; a rotary shaft is arranged below the motor; the bottom of the rotary shaft is connected with a stirrer through a connecting rod; the rotary shaft penetratesinto the reaction kettle body and is connected with a fixed rod; a feeding opening is formed in one side above the reaction kettle body; a manual kettle opening valve is arranged at the other side above the reaction kettle body; an outer frame is arranged on an outer wall of the reaction kettle body. According to the reaction kettle disclosed by the invention, the outer frame of the device is ofa hollow structure; a water inlet is arranged above the outer frame, cooling water can be fed into the outer frame through the water inlet and the heat dissipation of the reaction kettle body is accelerated, so that the reaction efficiency of the reaction kettle body is improved; the device is used for limiting the position of the rotary shaft through the fixed rod and a bearing is arranged at a connecting part of the rotary shaft and the fixed rod, so that the device has higher stability in an operation process and the practicability of the device is improved.