The invention provides a leather drying all-in-one machine and belongs to the field of leather. The leather drying all-in-one machine comprises a drying box, a guide rail and an installation rack arranged on the guide rail. The installation rack comprises a first installation frame, a second installation frame, a first lifting frame and a second lifting frame. Iron gauzes are evenly distributed between the first installation frame and the second installation frame. A first fixing frame is fixed to one side faces of the first installation frame and the second installation frame. A second fixing frame is fixed to the other side faces of the first installation frame and the second installation frame. The guide rail is in an annular shape, and a first electric heating pipe and a second electric heating pipe are fixed to the drying box. A first baffle and a second baffle are vertically fixed to the drying box. The leather drying all-in-one machine is simple in structure and has the beneficial effect that leather can be conveniently dried.