The utility model provides an automatic foaming machine of polyurethane insulation, including motor, storage tank, gear change case and insulation can, the motor links to each other with the gear change case, and the storage tank passes through the pipeline and links to each other with the gear change case, is provided with the solenoid valve that is connected with the gear change case on the pipeline, and the gear change incasement is equipped with two measuring pumps, and two measuring pumps link to each other with the discharge gate, are provided with ejection of compact valve on the discharge gate, and the insulation can setting is in discharge gate department. The utility model discloses automatic stirring is high-efficient even, adopts high-accuracy measuring pump to measure, and the structure is special, and wear-resisting bad news are strong, can not leak the material, long service life, and raw materials cooperation adjusting range is broad, and product quality and performance are unique, easily the adjustment, the department sets up an insulation can at the discharge gate, and the temperature of insulation can is a definite value through setting for the back, and the temperature of the polyurethane that the assurance was produced is a constatn value, and this just guarantees that ultimate polyurethane decorative board is qualified products.