The utility model relates to the technical field of medical instruments and particularly relates to a laparoscopic incision dilator comprising a main dilator body, wherein the main dilator body is provided with a first dilation part, a second dilation part and an adjusting mechanism; and the adjusting mechanism is used for adjusting and fixing the state that the first dilation part and the second dilation part do relative dilation or occlusion movement. When the laparoscopic incision dilator is used, a user dilates the first dilation part and the second dilation part to proper dilation angles according to the actual requirement, and then, the relative dilation states of the two dilation parts are fixed through the adjusting mechanism; and the adjusting mechanism is released when the dilation angles of the first dilation part and the second dilation part are required to be adjusted, and the relative dilation states of the two dilation parts are fixed again through the adjusting mechanism when the first dilation part and the second dilation part are adjusted to the proper dilation angles. The laparoscopic incision dilator can be used for dilating minimally invasive incisions with different diameters and ensuring the sufficient exposure of an operating region and is free of manual traction, simple in structure, convenient and labor-saving in operation and easy to clean and disinfect.