Profiled interface rail

The utility model discloses a profiled interface rail, which comprises a common rail body. The profiled interface rail is characterized in that the two ends of the rail body are provided with an axial profiled interface which corresponds to and matches with the matching rail body. The cross section of the profiled interface of the rail body is in the similar S or inverted S shape and is flat and straight in the axial direction; the two ends of the profiled interface are in the arc shape or in the similar z or inverted z shape and are flat and straight in the axial direction; the included angle of the two ends is larger than or smaller than 90 degrees; and the middle part can be additionally provided with a clamping plate in the position of the axial interface and can be connected through bolts, nuts and the like or connected completely through the combination of bolts, nuts and spring washers. The utility model overcomes the defects of the existing flush type straight-seamed interface rail, reduces the wheel