The invention provides a fiber rope quick connecting piece and a connection method. The connecting piece comprises a spiral fastener, an elastic fastener, a sliding key and a connector. the connector is cylindrical, an inner circle stair is arranged in the middle of the inner wall of the connector, the diameter of the inner circle stair is equal to the outer diameter of a fiber rope, an internal thread is arranged at one end of the connector, the internal thread is connected with an external thread of the spiral fastener, the other end of the connector is provided with holes, and the number of the holes is equal to that of braiding strands of a fiber noose. The connecting piece is used for producing a rigging, and the fiber noose is inserted and braided, the elastic fastener is tightened first, and friction force is gradually increased along with pressing of the fiber noose. Compared with the prior art, the method can be used for quickly connecting two fiber ropes in a non-inserted and non-braided mode, the connected fiber ropes have the strength same as a fiber rope, and the fiber rope can be easily lengthened or manufactured into a rope loop. The quick connecting piece can be used for manufacturing a quick connection fiber rigging, the rigging can adjust the connection position in a large range, or a plurality of clip joints are arranged on one fiber rope.