The utility model relates to a pedal-type mouse trap capable of being overlapped in a sheathing way, which is designed to be a style capable of being telescoped. Most apparatuses in the mouse trap are concentrated on the top wall of the mouse trap. The utility model solves the problems that the existing mouse trap is inconvenient to carry during field zoological practice, the apparatuses are apt to be bitten by mice, tools are damaged, and the like. The front part of the entire mouse trap is large and the rear part is small. An entrance and a bottom opening are square, the entrance is large and the bottom opening is small. A plurality of mouse traps can be sequentially overlapped in the sheathing way and can be conveniently carried. The upper edge of a front door is curled to be cylindrical and therefore the front door can rotate around a front door rotating shaft. When the mouse traps are stored, since the mouse traps are overlapped in the sheathing way, the front doors are pushed to the top walls of the traps and the external stop bars of the front doors are in external stop bar grooves. When the mouse trap is used for trapping a mouse, the external stop bar is pulled out from the external stop bar groove, the front door is put up, the mouse enters the trap from the front door, after the mouse smells the fragrance of baits, the mouse climbs into a bait placing dish for eating, the bait placing part of a pedal can be pressed down, the outwards extending bar of the pedal moves downwards, a pull rope is pulled, the front door is enabled to slip from a control sheet body and be held down, the internal stop bar of the front door blocks the front door and the goal of trapping the mouse is achieved.