Abstract: In order to study the transmission properties of laser in bubble films, the extinction section and the extinction efficiency of bubbles were calculated by means of Mie scattering theory.The light extinction properties of underwater bubble films were analyzed theoretically and validated in laboratory based on the Lambert-Beer law.The laser power transmitted through bubble film of different density, thickness, and distances was measured with a power meter.The results indicated that the power decayed exponentially with the density and the thickness, but had no relation to the distance between the film and the detector.The conclusions are helpful for optical detection of bubble wakes of ships.