The invention disclose machining machinery for grooving and drilling, and relates to the technical field of machining machinery. The machinery comprises a box body, a supporting table is fixedly connected to the bottom of the inner cavity of the box body, a machining groove is formed in the middle of the top of the supporting table, rolling wheels are arranged at the bottom of the inner cavity ofthe machining groove, a rotating disc is arranged in the inner cavity of a transverse plate, a horizontal moving device is fixedly connected to one side of the bottom of the rotating disc, and the side, far away from the transverse plate, of the horizontal moving device is fixedly connected with a grooving and drilling device; and the output end of a first motor is rotationally connected with a connecting rod through a coupler, the end, far away from the first motor, of the connecting rod is fixedly connected with a supporting rod, and the end, far away from the connecting rod, of the supporting rod is fixedly connected with the rotating disc. When a machining part is replaced for the machinery or when the machinery stops working, a cutter retracts into a machining box, so that the problemthat the cutter collides with the machining part, then the cutter and the machining part are damaged, so that the machining quality is influenced is solved, the workpiece is convenient and easy to install, the difficulty is lowered, the time is saved, and the machining efficiency is improved.