The invention relates to the field of drilling and excavating equipment, and provides a reaming drill bit and a drilling tool. The reaming drill bit comprises a drilling drill body and a reaming drillbody, wherein the reaming drill body comprises a connecting piece, a reaming cutter body and a rotating component, the reaming cutter body is rotationally connected with the connecting piece, the reaming cutter body is arranged on the periphery of the rotating component, and the rotating component is fixedly connected with the drilling drill body. When the reaming cutter body is in a closed stateand needs reaming, the rotating part reversely rotates and drives the reaming cutter body to rotate and open relatively to the connecting piece, and the reaming cutter body is kept in an open state and synchronously rotates with the rotating component. When the reaming cutter body is in the opened state and needs reaming, the rotating component rotates forwards and drives the reaming cutter bodyto rotate and close relative to the connecting piece. The reaming drill bit and the drilling tool are easy and convenient to use during reaming operation, simple in structure and suitable for reinforcing anchor rod and anchor cable supporting effects in coal mines and geotechnical engineering.