Waterproof board laying device with length-width ratio adjusting function for tunnel and method thereof

The invention relates to the technical field of tunnel waterproof plate laying, in particular to a waterproof plate laying device with a length-width ratio adjusting function for a tunnel and a method thereof, and the waterproof plate laying device comprises a mobile adjusting device, an EVA waterproof plate, a first laying device and a second laying device. According to the laying device, the movable adjusting device is arranged, and the use width distance between sliding adjusting tooth frames in the movable adjusting device can be conveniently adjusted, so that the use distance between a first laying part and a second laying part in the first laying device and the second laying device can be adjusted; multiple groups of track plates can be spliced for use, so that the moving length in the first laying device and the second laying device can be conveniently adjusted, and the use width and length of the device can be conveniently adjusted according to different sizes of tunnels; and the EVA waterproof plates