An optical module including a circuit board and an optical transceiver part having a transceiver body that is provided with a first notch, one end of the circuit board is inserted in the first notch. An upper surface of the transceiver body has a first and second receiving grooves, a lower surface of the transceiver body has a first emission groove, a emission launch groove and a third emission groove that are sequentially arranged in height. An optical receiver is arranged in the receiving grooves to realize reception of optical signals; and an optical emitter is arranged in the emission grooves so as to realize emission of optical signals.