Detection method of laser radar and laser radar

The invention provides a detection method of a laser radar and the laser radar, and relates to the technical field of laser radars, and the method comprises the steps: controlling a light source module to generate a first combined wave detection signal and a second combined wave detection signal; controlling the light source module to generate at least two beams of first local oscillation signals and at least two beams of second local oscillation signals; a first photoelectric detection module is controlled to receive the first local oscillator signal, the second local oscillator signal and a first combined wave echo signal, and the first combined wave echo signal is a signal formed by reflecting the first combined wave detection signal through the target object; a second photoelectric detection module is controlled to receive the first local oscillator signal, a second delay local oscillator signal and a second combined wave echo signal, the second delay local oscillator signal is a signal obtained after the