Abstract: A new microwave digestion device is introduced in this paper. Two embed single-chip computers are used to control the system. The peak power can be continuously tuned. Microwave energy is transferred through double parallel magnetrons. IR temperature measurement, water pressure transferring and other new technologies are applied in this microwave digestion oven. The asynchronous communicating with PC realizes graphic setup on operation and measurement-control. The large room is offered to the study on the digestion mechanism for different type of samples.