The utility model relates to the technical field of track traffic, in particular to a turnout-free connected track group with different track gauges. The turnout-free connected track group with the different track gauges solves the problems that when an existing track group with different track gauges is crossed, a turnout needs using for carrying out connection, so that the turnout is damaged, high in cost, and frequent in operation, and times of locomotive parking are frequent. The turnout-free connected track group with the different track gauges comprises a first track (1), a second track (2) and a guard rail (3). A rail gauge of the second track (2) is smaller than that of the first track (1), the second track (2) is crossed with the first track (1), one portion of the second track (2) is arranged in the first track (1), and the other portion of the second track (2) is arranged outside the first track (2). Breaking openings which can enable locomotives to operate along respective tracks are arranged on the crossed position of the first track (1) and the second track (2), and the guard rail (3) is arranged on inner sides of tracks, corresponding to respective gaps of the first track (1) and the second track (2). The turnout-free connected track group with the different track gauges is simple in structure and reasonable in design.