The invention provides a laser light source reflective sighting telescope which comprises a telescope body, an inner pipe, a laser, an optical fiber and a concave reflecting mirror. Front protective glass and back protective glass are fixed onto the front end surface and the back end surface of the telescope body; the laser and the optical fiber are arranged in the telescope body and are in coupled connection; the inner pipe is arranged in the telescope body; the concave reflecting mirror is arranged at the front end of the inner pipe and is inclinedly arranged relative to the axis of the inner pipe; a light transmitting hole is formed in the circumferential wall of the inner pipe; an optical fiber seat is arranged at the position, located at the light transmitting hole, in the telescope body; an optical fiber support ring is fixed into the optical fiber seat; the tail end of the optical fiber penetrates through the optical fiber support ring along the radial direction of the inner pipe; the tail end of the optical fiber is located on a focal plane of the concave reflecting mirror; an emergent ray of the optical fiber penetrates through the light transmitting hole; an included angle is formed between the emergent ray of the optical fiber and a main optical axis of the concave reflecting mirror; and a laser light can be reflected out of the telescope body from the back protective glass through the concave reflecting mirror. According to the laser light source reflective sighting telescope provided by the invention, a laser diffraction phenomenon of the sighting telescope canbe improved, and sighting cannot be interfered.