Research on anti electricity stealing device is significant, but current research on stopping electricity stealing in current method is lacking. This article designed a wireless current transmitter, which is an important part of low voltage intelligent anti-Stealing devices. It can obtain current signal on the low voltage side of three-phase distribution transformers, and have a wireless transmission to the examiner host and compare with electricity users’ meter parameters, which prevents electricity stealing in the current method from distribution transformers to metering meters. Since it is not easy to obtain power supply in filed environment, this paper also designed a draw-out power supply. Furthermore, the results of experiment show that this measurement system has high accuracy and good interference immunity in a wide range of high current, and is able to make a long-distance transmission with low power consumption.