The invention provides a laser ranging radar and a power supply control method therefor. The laser ranging radar comprises a laser transmit-receive module which is used for transmitting and receiving a ranging laser, a laser reflector which is used for reflecting the ranging laser transmitted by the laser transmit-receive module to a measured object and for reflecting a ranging laser reflected by the measured object to the transmit-receive module, a motor which is used for driving rotation of the laser reflector, a wireless power supply module which is used for supplying power to the motor in a wireless manner, a wireless communication module which is used for obtaining coding data of the motor, and a master control module which is used for processing the coding data to obtain the rotation angle of the laser reflector, controlling transmission and reception of the ranging laser of the laser transmit-receive module, and processing the ranging laser to obtain the distance to the measured object. The motor is powered in the wireless manner, and internal communication is achieved using the wireless manner, so that the ranging laser cannot be blocked by a connection line, and the overall service life is prolonged.