Film wrapping and edge folding mechanism and film wrapping device

The invention discloses a film-wrapping and edge-folding mechanism and a film-wrapping device. The film-wrapping and edge-folding mechanism comprises a translation assembly, a film-wrapping assembly and an edge-folding assembly, the folding knife assembly is fixedly connected with the translation assembly, the translation assembly is used for driving the folding knife assembly to move in the first direction, the folding knife assembly is provided with an initial position and an edge folding position, the folding knife assembly is obliquely arranged relative to the first direction when located at the initial position, and the edge folding position is located at the edge folding position. And when located at the edge folding position, the short edge is parallel to the short edge of the battery cell. When the folding knife assembly descends to the height close to the short edge of the battery cell and the translation assembly drives the folding knife assembly to extend out, the folding knife assembly rotates, and it is guaranteed that the folding knife assembly cannot collide with an arched side plate when the side plate of the battery cell is attached poorly.