The invention discloses a safe environmental mousetrap. The mousetrap comprises a box body, the box body is a cube, an opening is formed in the upper portion of the right side surface of the box body,and a supporting plate and a climbing slope surface are arranged on the opening; the supporting plate is connected with the climbing slope surface, and the climbing slope surface can vertically rotate around the supporting plate; a hook is arranged on the top surface of the box body, a lever plate is arranged below the hook, the hook is connected with the middle left position of the lever plate through a rotary shaft, and the lever plate can vertically swing along the hook; the right end of the lever plate presses over the supporting plate, and the left end of the lever plate is suspended inthe box body; an insertion needle is arranged above the left end of the lever plate and used for fixing bait. According to the safe environmental mousetrap, the mouse bait is placed on the insertion needle to lure a mouse, the mouse climbs to the supporting plate along the climbing slope surface and then climbs to the lever plate to acquire the food, when the mouse approaches the bait, the mouse falls into the box body because of the lever principle and cannot escape, and mouse trapping can be continuously conducted; the design is simple and practical, and the mousetrap is safe and environmentally friendly.