The invention provides a laser radar, and the laser radar comprises an optical machine rotor. The optical machine rotor comprises a body, a transmitting part, a receiving part and a fin group, whereinan accommodating cavity is formed in the body, and the transmitting part and the receiving part are arranged in the accommodating cavity and are fixedly connected with the optical machine body; the fin set is arranged on the outer side face of the cavity body of the accommodating cavity and fixedly connected with the body. According to the laser radar, the heat dissipation efficiency can be improved.