Method for quickly and automatically measuring trackside equipment limit

The invention provides a method for rapidly and automatically measuring a trackside equipment limit. A device comprises a measuring vehicle, a laser scanner, a camera, a lens, an encoder and an arithmetic device, wherein the laser scanner, the camera and the encoder are arranged on the measuring vehicle, and the lens is arranged on the camera; the laser scanner, the camera and the encoder are respectively in communication connection with the arithmetic device; the method comprises the following steps: acquiring an image by setting a camera, identifying a target equipment area in a frame-selected image through a pre-trained model, judging whether the frame-selected area is an optimal image or not according to the position of the frame-selected area in the image, and recording corresponding mileage data as the actual mileage of the corresponding target equipment for the optimal image. And after mileage calculation of all the trackside devices is completed, the limit distance of the adjacent trackside devices is