The invention discloses a small low-altitude light area array laser radar measuring system. The master control sub-system of the measuring system triggers a pulse laser emitting module to emit lasers, the lasers are collimated and generate two paths of laser signals through a beam splitting sheet, one path is used for determining the time of emitting the lasers and generating timing starting signals, the other path irradiates an object through beam expansion, echo signals are received by an APD array detection module and generate N2 paths of stopping pulses, and a multi-channel high-precision time interval measuring module is combined with starting signals to measure the round-trip flight time difference of N2 paths of lasers of a rectangular detection area. The location attitude measuring sub-system, the master control sub-system and the area array laser radar distance-measuring sub-system of the measuring system are integrated, original three-dimensional information can be obtained in real time, and assembling and verification are eliminated. The laser radar measuring system does not need scanning, three-dimensional imaging can be achieved through a single pulse, the imaging speed is high, measuring precision and working efficiency are high, the size is small, the weight is small, and the small low-altitude light area array laser radar measuring system is suitable for being carried small low-altitude light remote sensing platforms.