Polyurethane foaming machine metering pump has been used in the field of polyurethane. Polyurethane is used for manufacturing the urethane products mixed by a constant ratio with polyol and isocyanate, which are raw materials of urethane. Polyurethane foaming machine metering pump used in manufacturing the urethane can be divided by low pressure and high pressure mixing methods according to mixing methods. This study found out the lifetime characteristics of the polyurethane foaming machine metering pump before and after the durability tests.