The invention discloses a continuous correction method for the absolute position of a train in a local scope. The continuous correction method comprises the steps that a height difference positional matrix mounted on the ground is measured through a distance measurement sensor set mounted on a vehicle body; and the distance fed back by the distance measurement sensor set is converted into a coded sequence relative to positions to calculate the absolute position where the train is located, wherein the height difference positional matrix is a height difference matrix with the length being M and the width being N, basic component units of the height difference positional matrix are positioning units of certain heights, the positioning unit of each height has a unique code, and the distance measurement sensor set comprises N distance measurement sensors. Through the continuous correction method, the uncertainty of the train operation distance can be greatly lowered, and the reliability and safety of benchmarking parking of a driverless train operation (DTO) system and an unattended train operation (UTO) system can be greatly improved.