The influence of multiple scattering on laser-transmissometer visibility measurement accuracy is analyzed in detail in this paper.And a model of error analysis under different values of both low and high visibility is put forward for the laser-transmissometer affected by the length of baseline length,the value of receiver field of view and the level of multiple scattering.For both of the two cases,removing and not removing the multiple scattering part in the total recei ved light energy,the atmospheric transmittance values are calculated by both Monte Carlo method an d Bouguer-Lambert′s law.Then,according to the curves of the transmittance derived from the simulat ion results,the paper analyzes the influence of multiple scattering under different values of both low and high visibility. Finally,combining with the working principle of variable length of baseline and variable value of receiver field of view,the visibility error analysis model for the laser-transmissomet er is given.The simulation results show that in low visibility atmosphere,the influence of multiple scattering on t he visibility measurement accuracy is considerable,while it can be effectively i nhibited by selecting the appropriate length of baseline length and the appropri ate value of receiver field of view.