The invention discloses a perfusion device used for gastrointestinal surgery. The device comprises a base and a liquid storage tank on the base. The top of the base is fixedly provided with a supporting plate. One side of the supporting plate, close to the liquid storage tank, is fixedly provided with a placing plate. The top of the placing plate contacts with the bottom of the liquid storage tank. The top of the placing plate is fixedly provided with a limiting plate. One side of the limiting plate, close to the supporting plate, contacts with one side of the liquid storage tank, the side being far away from the supporting plate. One side of the supporting plate, close to the placing plate, is provided with a fixing groove. The fixing groove is internally slidably provided with a bearingplate. One side of the bearing plate, close to the liquid storage tank, is provided with a bearing base. The bearing base is on the placing plate. The liquid storage tank and the supporting plate arerespectively on two sides of the bearing base. One side of the bearing base, close to the liquid storage tank, is slidably provided with a clamping plate. The device provides convenience for clampingand fixing the liquid storage tank, and improves stability of the liquid storage tank. The device has buffer effect when the liquid storage tank is clamped. The device is simple in structure and convenient in use.