Firstly the principle of CMOS photodetectors is introduced,and some basic theories of supercontinuum are discussed. The experiment equipment is built with self-developed supercontiuum light source as interference source. The output power is about 3W and spectrum range is 600～1700 nm. Based on the supercontinuum light source,the high power interference experiment is carried out with CMOS detector as the imaging component. The saturation images are collected from CMOS under different laser power densities. The image data is analyzed and interference effect pictures are drawn. When the power density in the CMOS detector is 3.14×10-3W/cm2,gray chart of single picture elements is achieved,and the result is discussed.