The utility model belongs to millimeter wave formation of image field provides a millimeter wave imaging device. The utility model discloses an adopt including the crystal oscillator, the ware is divided to the merit, millimeter wave transceiver module, local oscillator signal processing module, first first detector and image processing module's millimeter wave imaging device, divide the ware to carry out power distribution and export clock signal and the local oscillator signal the oscillating signal that the crystal oscillator produced by the merit, first local oscillator signal is handled and exported by local oscillator signal processing module to the local oscillator signal, an intermediate frequency signal is handled and exported by millimeter wave transceiver module to the echo signal that the object that awaits measuring reflects, carry out a first local oscillator signal and an intermediate frequency signal mixing and export the 2nd intermediate frequency signal by first first detector, handle and form images the 2nd intermediate frequency signal by image processing module, because the local oscillator signal source of millimeter wave transceiver module's clock source and first first detector is regarded as simultaneously to the crystal oscillator, therefore, the device does not need additionally to increase the local oscillator signal source, the circuit structure is simplified, thus the cost is reduced.