The non-uniform distribution of microwave field and the non-uniform absorption in fresh food during microwave drying lead to the uneven quality. Combining the advantages of the high efficiency of microwave drying with the uniformity of fluidized drying, water vapor was removed by hot airflow. A microwave-hot-airflow vibrating dryer (MAVD) was developed based on drying uniformity. The MAVD device mainly included a fluidized bed system, a hot air heating system, a microwave heating system, a temperature measurement system and a control system. The positions of magnetron in drying chamber were simulated and optimized with the software of Ansoft HFSS. The results showed that when the height of the tray was constant from the bottom of the box, the positions of the four microwave feed ports were 30mm away from the original port position, thus the surface electromagnetic field distribution of the material was more uniform. The performance of the device was tested with green soybean. The results showed that the design and control system of the drying test platform were reliable. The drying time of MAVD was 54min, which was 34.1% shorter than that of microwave fluidized bed drying alone, and the uniformity of products was significantly improved. The research results provided reference for microwave drying equipment to improve the uniformity of microwave heating.