Medical dilator with lighting function

The medical dilator with the lighting function comprises a dilation rod, a handle, a connecting cap and a dilation hook portion, the dilation hook portion is arranged at one end of the dilation rod, the connecting cap is arranged at the other end of the dilation rod, the dilation hook portion, the connecting cap and the dilation rod are integrally formed, and the end, provided with a light source, of the handle is connected with the connecting cap on the dilation rod. A battery is mounted in the handle, a cap is screwed at the upper end of the handle, an optical fiber bundle is arranged in the dilating rod and the dilating hook part, one end of the optical fiber bundle penetrates through the shading block and extends into the connecting cap, and the other end of the optical fiber bundle extends to the end part of the dilating hook part; the optical fiber bundles are arranged in the dilation hook part and the dilation rod, optical fibers of a light source on the handle are guided to a wound position for operat