Abstract: The paper analyzed the current coal slurry drying technology in China,described the principle and characteristics of microwave drying,and introduced the structure and working principle of microwave drying equipment for coal slime which is independently researched and developed.The experiment of microwave drying coal slime was conducted by using this equipment under different microwave power,conveying speed and thickness of coal slime,the experimental results showed that for drying the wet slime under conditions of microwave power is 60 kW,the thickness of slime layer is 60 mm and the conveying speed is 21 m/h、24 m/h or the microwave power is 60 kW,55 kW,50 kW,their corresponding applied slime layer is 50 mm and the conveying speed is 27 m/h,the microwave drying equipment can both meet the requirements of the moisture decreased by 10% and the treating capacity is 1 t/h.