High-precision agent injection device

The utility model relates to the technical field of agent injection devices, and discloses a high-precision agent injection device which comprises a base, a mounting plate and a controller are fixedly arranged on the outer wall of the base respectively, supporting legs are fixedly assembled on the top of the base, and a fixing plate is fixedly arranged on the tops of the supporting legs. Through the arrangement of a stress plate, a material injection screw rod, a piston, an extrusion rod, a signal receiver and a signal emitter, the agent injection device can store a defoaming agent through a material storage barrel in the oil refining process, and then the material injection screw rod is driven to rotate through a material injection motor; according to the anti-foaming agent injection device, the stress plate and the extrusion rod are made to extrude and inject the anti-foaming agent in the storage barrel through the piston, meanwhile, the signal receiver and the signal emitter are used for counting the numbe