Tool magazine replacing device and PCB drilling machine

The utility model relates to a tool magazine replacing device which comprises a mounting plate, a first tool box and a second tool box. The mounting plate is used for being connected with a rack; the first cutter box is used for accommodating a first specification cutter and is detachably connected to the mounting plate; the second cutter box is used for containing a second specification cutter, the second cutter box and the first cutter box are arranged in a spaced mode, and the second cutter box is detachably connected to the mounting plate. The first cutter box is used for containing first-specification cutters which are low in use frequency, and the second cutter box is used for containing second-specification cutters which are high in use frequency. When the second-specification tools which are high in use frequency are seriously abraded and need to be replaced after being used for a long time, the manipulator only needs to replace the second tool box, the situation that the first-specification tools ins