The invention discloses an inclined-hole machining device. The inclined-hole machining device comprises a drilling device, a lifting seat, a lifting rod, a working table and a base. A control panel isarranged on one side of the drilling device, a camera is arranged at the bottom end of the drilling device and located adjacent to one side of the control panel, and the lifting seat is arranged on the other side of the drilling device. The lifting rod is arranged on the middle portion of the lifting seat, the base is arranged at the bottom end of the lifting rod, a supporting rod is arranged atthe top end of the base, the working table is arranged at the top end of the supporting rod, a disassembling roller is arranged at the top end of the lifting rod, and the disassembling roller facilitates the disassembly and installation of the drilling device, so that maintenance is easier. During drilling, the camera plays a role of positioning, the camera together with a shooting head can generate a drilling route so as to determine the drilling position of a drilling tool on a workpiece, the drilling accuracy is improved, a runner can rotate by 360 degrees, the inclination of the drilling tool is changed according to the generated drilling route, different inclined holes can be drilled, and a sonic wave range finder can control the drilling depth of the drilling tool during drilling machining.