Coastal highway amphibian and reptile channel and layout method thereof

The invention relates to a coastal highway amphibian and reptile animal channel and a laying method thereof, and relates to the field of animal protection. The device comprises two fixed rails mounted on the left side of an inner cavity of a highway culvert. By means of the floating plate body, the buoyancy of the floating plate body can drive the middle platform to move upwards during flood tide, it is guaranteed that the middle platform cannot be submerged and is still kept stable under limiting of the fixed rail, and when the flood tide or rainfall accumulated water is gradually evaporated and infiltrated, the water level in the culvert starts to be lowered from the highest position; the middle platform gradually descends to the daily height along with water level lowering, the side platforms and the middle platform are connected through the telescopic elastic cloth, the telescopic elastic cloth can be pulled by the middle platform in the lifting process so that the telescopic elastic cloth can be stretche