Abstract: To understand the property of microwave pyrolysis of municipal solid waste, microwave pyrolyzer made by our lab was introduced in this study. The effects of microwave pyrolysis temperature on pyrolysis products, regulation of gas yield and the composition of the gas were investigated. The results showed that the temperature of municipal solid waste under microwave pyrolysis was quickly increased. Microwave pyrolysis of municipal solid waste exhibited short pyrolysis time. The solid component was decreased from 55% to 26%, the liquid component was increased from 21.52% to 27.83%, the pyrolytic gas component was increased from 12% to 35% with microwave pyrolysis temperature increased from 400℃ to 600℃. The gaseous products were composed of hydrogen, carbon monoxide, methane, carbon dioxide and hydrocarbon, et al. Methane content was increased with the increasing of temperature. The content of hydrocarbon reached at the top in 500℃. Hydrogen content was low in 450℃, and quickly improved with the temperature above 550℃.Those results obtained from microwave pyrolysis provide foundational data for the new utilization of municipal solid waste resources.