Beam splitting prism assembly and beam splitting system

The utility model provides a beam splitting prism assembly and a beam splitting system. The beam splitting prism assembly comprises a parallelogram prism, a trapezoid prism and a beam splitting film. The beam splitting film is arranged on the combined surface of the parallelogram prism and the trapezoidal prism; the parallelogram prism comprises a light incident plane and a first light emergent plane which are parallel and opposite to each other, the trapezoidal prism comprises a second light emergent plane, and the first light emergent plane and the second light emergent plane are located on the same vertical plane; wherein a light beam vertically enters the light splitting film from the light incident surface to form a first split light beam and a second split light beam, the first split light beam is emitted from the first light emergent surface to form a first emergent light beam, the second split light beam is emitted from the second light emergent surface to form a second emergent light beam, and the fi