Laser particle analyzer for realizing omnibearing measurement and measurement method

The invention provides a laser particle size analyzer for realizing omnibearing measurement and a measurement method. The laser particle size analyzer comprises a rotary laser transceiver and a samplepool, and the rotary laser transmitter-receiver is rotatably arranged around the sample pool by taking the sample pool as a rotation center; the rotary laser transceiver comprises a rotary device anda measuring device arranged on the rotary device, and the measuring device is used for transmitting a laser signal to the sample pool and detecting an echo signal. According to the laser particle size analyzer and the measurement method thereof, continuous seamless receiving of scattered light of 0-180 degrees can be achieved, and then the measurement lower limit of the laser particle size analyzer is expanded. The measurement result well conforms to a nominal value, and the measurement lower limit is close to the theoretical limit of a static light scattering method. And multi-angle measurement is carried out by adop