Receiving assembly, assembling method thereof and laser radar

The invention discloses a receiving assembly, an assembling method thereof and a laser radar. The receiving assembly comprises a circuit board and a receiving installation seat, a photosensitive device is installed on the circuit board, the receiving installation seat is connected with the circuit board, the receiving installation seat is provided with a plurality of limiting faces arranged on the outer side of the circuit board, and at least two limiting faces are arranged in an included angle mode and make contact with the side face of the circuit board so as to position the position, relative to the receiving installation seat, of the circuit board. According to the invention, the side surface of the circuit board of the receiving assembly is arranged to be in contact with the plurality of limiting surfaces forming the included angle, so that the position of the photosensitive device relative to the receiving mounting seat can be accurately aligned, the assembly method is simple, and the assembly efficienc