The invention discloses a multifunctional drilling machine for machining. The multifunctional drilling machine for machining comprises a bottom plate. A frame is fixedly connected to the top of the bottom plate, the bottom end of the outer wall of the frame is fixedly connected to a motor rack, the top of the motor rack is fixedly connected to a first motor, the first motor is fixedly connected to a first gear through a first motor output shaft, the first gear is engaged to a semi-gear, and one end, far from a tooth surface, of the semi-gear is fixedly connected to a first supporting rod. The invention relates to the technical field of construction machinery. According to the multifunctional drilling machine for machining disclosed by the invention, the problems that some large perforating machines are not conveniently moved and are low in work efficiency and low in precision, and workers will inhale a lot of dust to affect physical health in manual operation are solved, the position required to be drilled by the drilling machine is precisely positioned, the precision is improved, the error of manual operation is reduced, and the work environment and the work efficiency of the workers are improved greatly.