An optical fiber connector, , comprising a main shaft, , a connecting piece, , and a lock cap, , wherein the main shaft, , comprises a head end, , and a tail end, , that is away from the head end, , a through hole, , extending from the head end, , to the tail end, , is disposed in the main shaft, , the connecting piece, , is fixedly connected to the head end, , and partially accommodated in the through hole, , the lock cap, , comprises a sealing portion, , and a connection portion, , that is connected to a side of the sealing portion, , the sealing portion, , is rotationally connected to an outer side of the head end, , the connection portion, , is located on a side that is of the head end, , and that is away from the tail end, , the connection portion, , is configured to partially accommodate an adapter, , when the connecting piece, , is inserted into the adapter, , a lock protrusion, , is disposed on an inner side of the connection portion, , and the lock protrusion, , is configured to be snap-fitted to a lock slot, , of the adapter, , when the lock cap, , is rotated by a first angle relative to the adapter, , wherein the first angle is less than or equal to 90°; characterised in that the connecting piece, , comprises a connection base, , and one or more connection terminals, , one end of the connection base, , is inserted into the through hole, , and the one or more connection terminals, , are fastened to the other end of the connection base, 311; wherein the connection base, , comprises a fastening portion, , and one or more mounting portions, , located on a side of the fastening portion, , the one or more mounting portions, , are partially inserted into the one or more connection terminals, , in a one-to-one correspondence manner, and the fastening portion, , and the one or more mounting portions, , are integrally formed; wherein two lugs, , are disposed on a top that is of the head end, , two limiting blocks, , of the two lugs, , are bent towards each other and wherein the two lugs are disposed opposite each other; and wherein a locating plane, , facing the one or more mounting portions, , is disposed on the fastening portion, , when the connection base, , of the connecting piece, , is mounted to the main shaft, , the two limiting blocks, , on the two lugs, , of the head end, , of the main shaft, , are snap-fitted to the locating plane, . the connecting piece, , comprises a connection base, , and one or more connection terminals, , one end of the connection base, , is inserted into the through hole, , and the one or more connection terminals, , are fastened to the other end of the connection base, 311; wherein the connection base, , comprises a fastening portion, , and one or more mounting portions, , located on a side of the fastening portion, , the one or more mounting portions, , are partially inserted into the one or more connection terminals, , in a one-to-one correspondence manner, and the fastening portion, , and the one or more mounting portions, , are integrally formed; wherein two lugs, , are disposed on a top that is of the head end, , two limiting blocks, , of the two lugs, , are bent towards each other and wherein the two lugs are disposed opposite each other; and wherein a locating plane, , facing the one or more mounting portions, , is disposed on the fastening portion, , when the connection base, , of the connecting piece, , is mounted to the main shaft, , the two limiting blocks, , on the two lugs, , of the head end, , of the main shaft, , are snap-fitted to the locating plane, . <EOS>