The invention relates to the technical field of mechanical equipment, in particular to a drilling machine with an adjustable drilling angle. The drilling machine can achieve the purpose of one-time clamping and multi-angle drilling of parts, and the practicability is improved. The device comprises a base, a first connecting rod, a second connecting rod, a connecting device, a rocking handle, a gear, a motor, a drill bit, an adjusting bending arm, a locking bolt, a control box and a wire. A support frame is arranged on the left side of the top end of the base. The left end of the first connecting rod is connected with the circumferential outer wall of the support frame. A clamping disc is arranged at the top end of the right portion of the first connecting rod. The left end of the second connecting rod is fixedly mounted at the top of the support frame. A through hole penetrating the top end and the bottom end of the connecting device is formed in the top end of the connecting device. Amovable groove communicated with the through hole in the connecting device is formed in the right end of the connecting device. The movable groove penetrates the bottom end of the connecting device,a boss is arranged at the left end of the connecting device, a through hole penetrating the top end and the bottom end of the boss is formed in the top end of the boss, and the through hole of the boss is communicated with the movable groove.