The invention discloses a hand-held drilling device with adjustable rotating speed, which comprises a device main body, a drilling drill bit, a drill bit connecting rod, a bevel gear, a drill bit connecting rod fixing piece, a resistance piece, a connecting paddle, a trigger, a spring, and a wire protection layer , a rotating motor, a rotating shaft, a transmission rod and a transmission rod fixing piece, the right side of the device main body is provided with a drilling drill, the left side of the drilling drill is provided with a drill connecting rod, and the left side of the drilling connecting rod is connected with the bevel gear Connection, the lower side of the drill bit connecting rod is provided with a resistance sheet, and the left side of the resistance sheet is provided with a connecting paddle. The hand-held punching device with adjustable speed has the characteristics of small size, easy to carry and transport, and is equipped with a wire protection layer, which can ensure that the wire will not be damaged due to strong vibration or bumps during use and carrying, which greatly guarantees The service life of the device is extended, the work efficiency of the staff is greatly improved, the difficulty of work is reduced, and time and effort are saved.