The utility model belongs to the technical field of pesticide production, especially, relate to a resin acid copper reation kettle, the reactor comprises a kettle, cauldron body bottom is equipped with the circular shape discharge gate, its characterized in that, the vertical support that is provided with is gone up to the cauldron body, the articulated xarm of installing on the support, the one end of xarm is located discharge gate below is the free end, and the other end is the stiff end, the free end of xarm is equipped with the wooden plug, the wooden plug with the discharge gate cooperatees, the stiff end of xarm is equipped with fixedly the fixed establishment of xarm. The utility model provides a resin acid copper reation kettle plugs up or opens the discharge gate control ejection of compact through operation xarm control wooden plug, and need not carry out the blowing operation under the discharge gate, and the resin acid copper of having avoided high temperature sputters on one's body the operating personnel, operate safer because the wooden plug has certain elasticity and a chemical properties stabilization, with low costs, the discharge gate of can effective shutoff cauldron personally experiencing sth. Part of the body.