Magnetotellurics plays an indispensable role in the exploration of minerals,the monitoring of natural disasters,and engineering prospecting.At present,most of the magnetotellurics instruments in the domestic market are imported from abroad.It is urgent to develop magnetotellurics instruments with independent intellectual property.Multipolarized magnetotellurics applies multiple sets of electrodes of different spacing to observe the electric field in the same direction,which obtains electric field information of different spacing ranges and helps improve the detection resolution.The paper introduces a multi-polarized magnetotellurics system.The system applies a set of electromagnetic field sensors to observe the natural electromagnetic fields within the range of 1-105 Hz,and can be used to realize the 0-2 000 m detection.The system possesses 2 magnetic channels and 3 electric channels,making it possible to observe multi-polarized magnetotellurics while to observe the vector and scalar of traditional magnetotellurics;the data acquisition software and data processing software are user-friendly,functional and easy to operate.Through multi-channel and multi-instrument consistency detection,and the comparison with overseas equipment,the system has good performance.The successful application in a metal mine prospecting shows that the system is promising in the application and can be widely used.