Multiple-gauge-protection drilling tool

A multiple-gauge-protection drilling tool comprises a drill bit, an annular gauge-protection tool body, a hollow gauge-protection drill bit and a drill rod, wherein the annular gauge-protection tool body is arranged at the root of the drill bit, tool wings, chip discharging grooves and gauge-protection cutting teeth are arranged on the annular gauge-protection tool body, the hollow gauge-protection drill bit is arranged at the rear portion of the annular gauge-protection tool body, a tubular base body, gauge-protection cutting teeth and a linkage part are arranged on the hollow gauge-protection drill bit, and the drill bit is connected with the annular gauge-protection tool body into a whole, and is connected with the hollow gauge-protection drill bit through the drill rod. The drill bit, the annular gauge-protection tool body and the hollow gauge-protection drill bit are the same in cutting diameter. The multiple-gauge-protection drilling tool has the advantages of completing the work of hole drilling and gauge protection at one time, reducing work steps, improving work efficiency, avoiding loss of a new drill bit, and prolonging the service life the drill bit.