The invention provides a carbon contact strip thickness measuring device based on an eddy current sensor. The invention belongs to the field of measuring equipment, the device includes a probe assembly and a monitor, the probe assembly comprises a support, a sliding block and a sensor. The support is of a vertically-arranged groove-shaped structure. The sliding block is arranged in the support andmoves up and down relative to the support; a spring enabling the sliding block to move downwards is arranged between the sliding block and the lower end face of the support, an induction piece is arranged at the upper end of the sliding block, a receding hole is formed in the area, corresponding to the induction piece, of the support, the sensor is arranged opposite to the induction piece and detects the vertical position of the induction piece, and the sensor is electrically connected with the monitor which is used for receiving, processing and displaying data. According to the invention, the thickness parameters of the carbon contact strip at different positions can be rapidly tested, data display and output can be carried out, the measurement is more intelligent and automatic, the precision is better, the readiness is better, and the storage and subsequent analysis are convenient.