Onboard single-fiber bidirectional optical assembly

The utility model relates to the technical field of optical modules, in particular to an onboard single-fiber bidirectional optical assembly, which comprises a supporting piece, a circuit board, an insertion core sleeve, a first lens, a receiving end optical assembly and a transmitting end optical assembly, and is characterized in that the supporting piece is arranged on one side of the circuit board and is fixedly connected with the circuit board; the first lens is arranged on the side, away from the circuit board, of the supporting piece and fixedly connected with the supporting piece, and the insertion core is arranged on the side, away from the supporting piece, of the first lens in a sleeving mode and fixedly connected with the supporting piece; the receiving end optical assembly and the transmitting end optical assembly are arranged at the top of the supporting piece through glue; and the receiving end optical assembly and the transmitting end optical assembly are electrically connected with the circuit