Flexible connection coupling

The invention provides a flexible connection coupler. The flexible connection coupler comprises a driving flange, a driven flange and a rope body. In the connection state, the driving flange and the driven flange are in butt joint, and a rubber mat is arranged between the driving flange and the driven flange. The flange holes in the driving flange and the driven flange are in one-to-one correspondence in the circumferential direction of the flanges, the rope body penetrates through each pair of flange holes corresponding in position, and the two rope ends of the rope body are knotted and fixed through lock catches. The flexible connection coupler is simple and practical in structure, an original rigid connection mode mainly based on a flexible diaphragm is changed into flexible connection through rope body penetrating hole connection, rubber mats between flanges and other designs, so that errors are allowed to be increased, the axial direction is not limited any more from the past 1 mm precision requirement,