The invention relates to the technical field of automobile fuse boxes, and provides a fuse box body, a fuse body cover, a fuse box body assembly and an automobile fuse box. The fuse box body is internally provided with a flow guiding piece fixing structure and flow guiding piece limiting structures located at multiple different positions, wherein the flow guiding piece limiting structure at the first position is located at the same position as the flow guiding piece fixing structure. The fuse box body is internally provided with the flow guiding piece fixing structure and the flow guiding piece limiting structures located at multiple different positions, so that a flow guiding piece is fixed through the flow guiding piece fixing structure and limited through the flow guiding piece limitingstructures located at different positions at different positions of the flow guiding piece when the flow guiding piece is assembled with the fuse box body, so that the flow guiding piece can be avoided from being twisted and deformed due to the action of nuts when the nuts are tightened so as to maintain the original shape, thereby realizing one-time convenient installation of the flow guiding piece, and ensuring stable current transmission and electric conduction safety of the flow guiding piece.