Abstract: A method for generating a speed control code for a train which is capable of enhancing the operational efficiency of the train, maximizing the train line capacity, and enabling a stable running of the train by detecting the speed of a preceding train and the distance between the preceding train and the next succeeding train of the preceding train and by generating a speed indication code corresponding to the speed of the preceding train, which includes a first step for detecting a speed and a position of the preceding train and the next succeeding train; a second step for generating a speed indication code to each intervening track interval so that the next succeeding train can stop within a predetermined safety distance when the interval between the position of the preceding train detected in the first step and the position of the next succeeding train is within the previously set safety distance; and a third step for generating a speed indication code corresponding to the speed of the preceding train to the