Railway track crack detection device

The utility model relates to the field of railways, in particular to a railway track crack detection device, and aims to solve the technical problems that detection equipment in the prior art needs to be accompanied and operated by a person, cannot work independently and cannot detect cracks of a track and a track plate at the same time during detection. Comprising a support 1, a power mechanism 2, a roller 21, a power input shaft 22, a sliding frame 23, a tension spring 24, a square rod 25, a first clamping plate 3, a laser transmitter 4, a second clamping plate 5, a laser receiver 6, a controller 7 and a track plate crack detection mechanism 8, the device automatically advances along a rail, when the device advances to a rail crack, light of the laser transmitter penetrates through the crack and is received by the receiver, the controller controls a recording module to record the crack position, and the track plate crack detection mechanism detects the track plate crack. And when the track board travels to