The utility model discloses an impregnation machine capable of saving electrolyte and protecting a guide pin. Capacitor processing technology field, the technical problems that in the using process ofexisting impregnation equipment, the electrolyte utilization rate is low, and an element guide pin is prone to pollution and corrosion are solved. The impregnation device comprises a support frame, an impregnation tank arranged on the support frame, a vacuumizing device, a liquid supply device and a control device, the control device controls impregnation operation through control valves installed on the vacuumizing device and the liquid supply device respectively, the impregnation tank comprises an impregnation tank body and a cover body, a detachable installation plate is arranged on the cover body, a clamping device is arranged on the installation plate, an electrolyte tray is arranged in the impregnation tank body, and a piston rod of the lifting hydraulic cylinder is fixed to the bottom of the electrolyte tray. The electrolyte tray capable of ascending and descending is matched with the clamping device, so that the purposes of reducing the using amount of working electrolyte andprotecting the element guide pin are achieved, environmental protection and energy conservation of impregnation equipment are achieved, and the guide pin is protected against corrosion and pollution of the electrolyte.