The invention discloses a high-precision laser radar system. The system mainly comprises a pulse flight time measurement portion, a triangle method distance measurement portion and a Kalman filteringfusion portion. Specifically, the pulse flight time measurement portion and the triangle method distance measurement portion are performed at the same time. A laser pulse transmitting module transmits a laser pulse to a space. A laser pulse receiving module sends a received laser pulse echo to the laser pulse flight time measurement module and the laser triangle method distance measurement module. Pulse flight time measurement and triangle method distance measurement are performed, then a result obtained by measurement is transmitted to a central processor module, Kalman filtering fusion is realized, fusion of measurement data is realized, and a measurement result whose precision is higher than that of original measurement is obtained.