The invention relates to an enhanced type electrode converting device of a high-density electrical method instrument in an exploration instrument for geophysics, which is applied to the field of high-density electrical method exploration. The electrode converting device is designed on the basis of the fundamental principle of the high-density electrical method instrument, and adopts the structureas follows: each electrode is controlled by a processor, the electrodes are mutually connected in series only by a multi-core cable, and subordinate machines are mutually connected in series, therefore, a whole measuring section can be covered. The subordinate machines are flexibly connected by cables and can be assembled and disassembled conveniently; the system can automatically number the subordinate machines without manual numbering, and can automatically identify failure and the position of the failure, therefore, the invention provides the more perfect distributing type electrode converting device.