The invention relates to an electromagnetic flowmeter converter of a wide voltage power supply type. The converter comprises a cylindrical shell, wiring ports located at the two sides of the shell, asensor interface located in the middle of the shell, a liquid crystal board located at the front end of the shell, a CPU main board located behind the liquid crystal board and connected with the liquid crystal board, and a power supply wiring board located at the rear end of the shell and connected with the CPU main board. The power supply wiring board is provided with a wiring port used for the wiring of an excitation wire and a signal wire, and the electromagnetic flowmeter converter is of the wide voltage power supply type, wherein a power supply circuit of the electromagnetic flowmeter converter comprises a two-way isolation switch power supply circuit and a low-voltage power supply circuit. Wide-voltage power supply can be realized, the shell of the electromagnetic flowmeter converterdoes not need to be disassembled when the sensor is connected, the wiring efficiency is high, and the wiring quality is stable.