The utility model discloses a seamless track steel rail displacement detection device. The utility model relates to a steel rail displacement detection device. The objective of the utility model is tosolve the problem that existing steel rail displacement measuring equipment is inconvenient to use. Workload is large, and the cost is high. The device comprises a solar cell module, a junction box,a wiring cable module and at least one group of detection sensor modules, each steel rail detection sensor is arranged close to one steel rail; a sliding shifting fork of the steel rail detection sensor is arranged on the steel rail; a fixed seat of the steel rail detection sensor is arranged on the upper surface of the track plate; a fixed seat of the track plate detection sensor is arranged on the upper surface of the track plate; sliding shifting forks of the track plate detection sensors are installed on the supporting columns, each temperature sensor is installed at the position, close tothe bottom end, of a steel rail, the track plate detection sensors, the two temperature sensors and the two steel rail detection sensors are connected with the junction box through wiring cable assemblies, and the track plate detection device is used for the field of steel rail displacement detection.