The utility model relates to the technical field of computer accessories, in particular to a structure of a mobile hard disk box with an A-shaped structure, which comprises a first box body, a second box body and a bottom plate, the first box body and the second box body are rectangular box bodies with symmetrical structures, and the top end of one side of the first box body is movably connected with the top end of one side of the second box body; a bottom plate is mounted at the bottoms of the first box body and the second box body, one side of the bottom plate is movably connected with the bottoms of the first box body and the second box body, and the other side of the bottom plate is attracted to the bottoms of the first box body and the second box body through magnetic force; by improving the structure of the mobile hard disk box with the A-shaped structure, the mobile hard disk box has the advantages of reasonable structural design, separation of the bottoms of the two box bodies through rotation, acceleration of air flow, convenience in overall heat dissipation, good supporting effect, more stable overall placement and difficulty in toppling over, so that the problems and defects in the prior art and equipment are effectively solved.