Abstract: In view of the problem that existing coal mine feed sensor cannot accurately detect the feed state when the load side is shielded cable, the paper researches the scheme of shield type intelligent mine-used feed state sensor and the principle that the feed sensor cannot detect the shielded cable. In combination with the current requirements of the mine and the actual installation, the overall design of the feed sensor, the detection probe, the signal processing circuit and the software anti-interference signal processing algorithm are described in detail. Experiments results show that the designed shielding type mine intelligent feed sensor can accurately judge the feed state of shielded cable in side load and accurately access the feed state of load side through the RS485 interface to existing monitoring system to meets the practical application.