Abstract: Mine hidden disaster sources are main causes of mine accidents, so the detection of mine disaster sources is an important method to guarantee the safety of mine. Mine intrinsically safe ground penetrating radar (GPR), such as ZTR12 GPR, with the characteristics of rapid, non-destructive and high resolution, is being widely used in the detection of unknown mine disaster sources. Existing ZTR12 GPR uses communication cable to realize multi-channel analog signal transmission. The interference between signals cannot be prevented with this method. Especially in the complex mine environment, signal is vulnerable to outside interference, causing instability and low SNR. This paper proposes a data transmission method based on Ethernet, using twisted-pair cable to transmit digital signal. The standard deviation’s volatility and similarity’s angle are applied to data stability analysis. The results show anti-interference ability and signal stability are greatly improved. Moreover, the replacement heavy communication cable with soft and light twisted pair makes ZTR12 GPR more portable.