Abstract: The effects of different microwave output power on the drying rate of waterborne polyurethane (WPU) emulsion with 30% solid content and the properties of the resulting films were studied using a self-made microwave equipment to obtain high gloss films. A suitable microwave power range for drying WPU emulsion was preliminarily determined according to the test results of IR, SEM, optical properties and mechanical properties of dried WPU films under different microwave power. Microwave drying, compared with oven drying, accelerated the drying process of WPU emulsion, and did not change the chemical composition of films. A film with better surface morphology was obtained under microwave power of 400W, compared with other power. Meanwhile the film has the characteristics with planeness of 11.40nm, glossiness of 93.28 Gu. With the increase of microwave power, the transmittance, mechanical properties, elongation at break and peel strength of the film increase.