Small-diameter bridge plug

The utility model provides a small-diameter bridge plug. The utility model relates to the technical field of oilfield water injection downhole tools. A slip, a cone, a protective bowl and a rubber sleeve are sequentially arranged between the central pipe outer push ring and the spacer ring in a sleeving manner; a slip, a cone, a protective bowl and a rubber sleeve are sequentially arranged betweenthe anti-collision ring and the spacer ring in a sleeving manner; a plurality of springs are arranged between the cone and the protective bowl in the circumferential direction; a shear pin is arranged between the cone and the central pipe; the slips are connected into an integral structure through the fixed connecting barrel, and the inner conical surface of the connecting barrel is matched and connected with the outer conical surface of the cone. According to the utility model, the integral slip and the thrust ring are arranged; the advanced setting phenomenon caused by impact deformation ofthe bridge plug in the we