Abstract: In order to study the relationship between the bubbles' backscattering signal intensity and the position of bubble film and receiver angle, based on Monte Carlo method, the backscattering signal was simulated under the boundary condition of the flume.Experimental results of backscattering signal were also obtained in different bubble film positions and receiver angles.It is turned out that there is a peak in backscattering signal,which is corresponding to a certain receiver angle for different bubble film positions.The conclusions are helpful for optical detection of bubble wakes of ships on the sea.