Railway roadbed underground water level monitoring system

The utility model relates to the technical field of railroad bed comprehensive engineering, and discloses a railroad bed underground water level monitoring system which comprises an inserting block which is in a hollow cylindrical shape, a circular opening is formed in the upper end of the inserting block, a first groove is formed in the side face of the inserting block, a connecting column is fixedly connected to the bottom side of the first groove, and the connecting column is in a cylindrical shape. Water-sensitive resistors are fixedly connected to the inner sides, corresponding to the inserting blocks, of the side faces of the connecting columns at equal intervals. According to the utility model, the insertion block is inserted into the ground needing to be measured, when water in the ground is in contact with the water-sensitive resistor, the water-sensitive resistor is electrified and then is electrically conducted to the connecting light column, so that the lamps on the connecting light column corresp