An optical fiber connector, comprising: a flat drop cable; a connector sub-assembly, wherein one end of the connector sub-assembly is fastened to the flat drop cable; a coupling shaft, wherein the coupling shaft is step-shaped and comprises a flange and a plastic body, wherein one end of the plastic body is provided with an internal thread that is configured to connect to an external thread of the connector sub-assembly; an elastic component, wherein the elastic component sleeves the coupling shaft, and one end of the elastic component abuts on a shaft shoulder that is of the coupling shaft and is close to the connector sub-assembly; an inner sleeving element, configured to accommodate the connector sub-assembly, wherein one end of the inner sleeving element is higher than an end surface of a ceramic ferrule of the connector sub-assembly, and the inner sleeving element is provided with an open slot, so that a cross section of the inner sleeving element is C-shaped; and an outer sleeving element, wherein the outer sleeving element is configured to sleeve the inner sleeving element, and capable of sliding forwards and backwards relative to the inner sleeving element; the outer sleeving element is of a step-shaped circular tube structure, and one end of the outer sleeving element forms an inner shaft shoulder inwards, which is configured to abut on the other end of the elastic component; and an inner wall of the outer sleeving element is provided with at least one protruding projection that is configured to buckle with an adapter when the optical fiber connector is plugged into the adapter, characterised in that the drop cable is flat; in that the body of the shaft is of plastic; and in that the flange of the shaft is provided with at least one hook groove, wherein the hook groove is configured to hook a strength member of the flat drop cable, the hook groove is a groove formed by cutting the flange, an opening of the hook groove is arc-shaped, and a bottom of the hook groove is formed by two end points (13451a, 13451b) of the hook groove and the flange. a flat drop cable; a connector sub-assembly, wherein one end of the connector sub-assembly is fastened to the flat drop cable; a coupling shaft, wherein the coupling shaft is step-shaped and comprises a flange and a plastic body, wherein one end of the plastic body is provided with an internal thread that is configured to connect to an external thread of the connector sub-assembly; an elastic component, wherein the elastic component sleeves the coupling shaft, and one end of the elastic component abuts on a shaft shoulder that is of the coupling shaft and is close to the connector sub-assembly; an inner sleeving element, configured to accommodate the connector sub-assembly, wherein one end of the inner sleeving element is higher than an end surface of a ceramic ferrule of the connector sub-assembly, and the inner sleeving element is provided with an open slot, so that a cross section of the inner sleeving element is C-shaped; and an outer sleeving element, wherein the outer sleeving element is configured to sleeve the inner sleeving element, and capable of sliding forwards and backwards relative to the inner sleeving element; the outer sleeving element is of a step-shaped circular tube structure, and one end of the outer sleeving element forms an inner shaft shoulder inwards, which is configured to abut on the other end of the elastic component; and an inner wall of the outer sleeving element is provided with at least one protruding projection that is configured to buckle with an adapter when the optical fiber connector is plugged into the adapter, characterised in that the drop cable is flat; in that the body of the shaft is of plastic; and in that the flange of the shaft is provided with at least one hook groove, wherein the hook groove is configured to hook a strength member of the flat drop cable, the hook groove is a groove formed by cutting the flange, an opening of the hook groove is arc-shaped, and a bottom of the hook groove is formed by two end points (13451a, 13451b) of the hook groove and the flange.