The application of the invention provides a detection device based on brain medical image fusion classification. The detection device based on the brain medical image fusion classification is characterized in that the detection device comprises a signal generating unit, a transmitting antenna and a receiving antenna, a signal acquisition unit, a signal processing display unit and a brain medical image fusion classification module, wherein the signal acquisition unit is connected with the brain medical image fusion classification module; the signal generating unit is a radio frequency microwavesignal source with amplitude, frequency and phase adjustable; the signal generating unit generates an excitation signal and a detection signal to be respectively transmitted to the transmitting antenna and the signal acquisition unit in two ways. The detection device based on the brain medical image fusion classification has the advantages of reducing complexity, and improving the quality of fusion images and classification accuracy.