In traditional laser radar system, the imaging is influenced by repetition rate of selected solid-state laser as well as scanning bandwidth and scanning precision in the laser scanning system. In order to improve the scanning bandwidth and precision, DFB high-repetition-rate semiconductor laser which was amplified by EDFA was adopted as the laser source firstly. Secondly, a two-stage composite laser scanning method had been proposed with combination of PZT and galvanometer. PZT got on meticulous scanning in small areas, then galvanometer was used to deflect and finish coarse scanning on the PZT scanning field and receiving the field. The scanning accuracy had been raised and the scanning field of laser radar had been expanded simultaneously. At last, azimuth of composite scanning laser radar is ±99 mrad, pitch angle is ±49.5 mrad. Angular resolution can measure up to 0.1 mrad, and the ranging precision can reach 0.159 m.