The invention discloses an edge cutting device capable of effectively preventing cloth from wrinkling, and relates to the technical field of cloth processing. To solve the wrinkle problem, specifically, the edge cutting device comprises a material guide mechanism and a cutting mechanism, wherein the material guide mechanism comprises two vertical plates fixed to the ground, as well as an adjustable clamping assembly, a damping clamping assembly and a tensioning assembly which are arranged on the outer walls of the vertical plates, the adjustable clamping assembly comprises pressing springs andfirst ejector pins, the tensioning assembly comprises tensioning springs and a tensioning roll, a tensioning frame is fixedly installed on the outer wall of each vertical plate, and a first sliding groove is formed in the inner wall of each tensioning frame. According to the edge cutting device, the damping clamping assembly and the tensioning assembly are arranged, when a conveying assembly is used for conveying, the damping clamping assembly can provide moving damping force for rotation of a cloth roll, due to the damping force, the two tensioning springs are pressed, thus downward tensionforce is generated for the cloth, so that the whole cloth is in a tension state, then wrinkles are avoided, and further, the size accuracy of a cutting assembly during cutting is guaranteed.