The green lidar is an effective tool for detecting aerosols. The laser in the lidar is a critical factor to the performance of lidar, because the progress of the laser can markedly improve the performance of lidar. Based on light source′s requirements of the micro pulse lidar, a compact high beam quality, high repetition rate and high pulse energy diode end-pumped acousto-optically Q-switched 532 nm laser is developed, which can be used as the laser source in lidar. At the repetition rate of 2 kHz, the Q pulse with energy of 0.9 mJ and pulse width of 22 ns is generated. The beam factor M2 is less than 1.76 and the energy instability is ±2%. The laser is helpful to improve the detection distance, detection speed and detection precision of micro pulse lidar.