The invention provides a microwave clothes dryer. The microwave clothes dryer comprises a housing opened at the front part for taking and putting clothes from the front portion, a microwave resonant cavity arranged in the housing, a microwave generating device configured to send microwaves into the microwave resonant cavity, a drum used for accommodating the clothes to be dried, an air inlet channel configured to guide environment air outside the housing into the microwave resonant cavity, an air outlet channel configured to exhaust humid and hot air in the microwave resonant cavity outside the housing, and a condensing heat exchanger, wherein the drum is rotatably arranged in the microwave resonant cavity and is provided with multiple through holes, the condensing heat exchanger is arranged between the microwave resonant cavity and the housing, and is configured to make the humid and hot air entering an air outlet channel exhausted outside the housing after being condensed. Therefore, the humid and hot air generated in the drying process can be exhausted after being condensed, and bad influence of humid air exhaust on an indoor environment is lowered.