The high power polarizing beamsplitter cube is made up of a pair of right angled prisms glued together, and a polarizing beam splitter film designed for the working wavelength is coated on the slope of one of the right angled prisms. The right angled prisms are connected using optical glue. Without the use of adhesive, the optical path does not have glue and can be used at high power. The incident light is divided into two orthogonal linearly polarized light beams, with p-polarized light transmitted and s-polarized light reflected. Each surface of the cube is coated with an anti reflective film to minimize surface reflection loss.