In this paper，based on the transmission characteristics of laser in small scale turbulent field，the turbulent flow field of propeller disturbed particles is simulated. The results show that there is a large scale vortex structure in the region far from the propeller；The temporal and spatial variation of particle concentration in small scale turbulence field is analyzed，the laser transmission model in small scale turbulence field is established，and the theoretical model is verified by pool experiment，which shows that the large scale vortex structure causes the particle concentration to change more violently in the region closer to the turbulent region far from the propeller. Finally，the transmission power model of the laser in the small-scale turbulent field is established，based on the change of the laser transmission power caused by the redistribution of the particles in the turbulent flow field of the propeller.
