In order to study the light energy distribution uniformity of the engineering application integrating sphere which with the lamp-house incident,In this paper,with Monte Carlo method,tracking the large number of photons that incident into the integrating sphere,the integrating sphere is level divided into five zone which area is equal,With matlab program,the light energy distribution of each zone is simulated with computer,the simulation results show that the light energy distribution uniformity of integrating sphere,this simulation can be provide guidance for the engineering application of the integrating sphere.