The invention relates to a method for indicating train carriage numbers of a train platform. A mechanism is involved and includes a carriage and train number processing unit (1), a train big data platform center (2), train tickets (3), a train number, station and platform unit (4), a transmission device (5), a wired or wireless transmission device (6), departure time of a train (7), an ECU device(8), an ECU debugging device module (9), data (10) emitted from the ECU device, an indicating device (11), a displayed train number and carriages (12), passengers with the tickets (13), indicator numbers embedded in the ground (14) and adjustment of positions of carriage numbers (15). The mechanism has the advantages of being fast, efficient, easy to operate, simple in structure, convenient in maintenance and the like.