The depolarizing splitting prism is composed of a pair of rectangular prisms glued together. The inclined plane of one of the prisms is plated with multilayer dielectric spectroscopic film. The energy spliting ratio of depolarizing prism is not sensitive to polarization state. The polarization state of the outgoing light is approximately the same as that of the incoming light. The mixed film layer of broadband depolarizing prism has some absorption of light energy but is not sensitive to polarization state.It is also insensitive to changes in incldent Angle. Considering the absorption characteristics of metal in the mixed film, it is recommended not to use in the strong laser environment.