The utility model provides a kind of iron bottom plate fixing device, it is related to iron bottom plate fixing technical field, including base, the outer surface of base is equipped with iron body, the outer surface of base is fixedly connected with antiskid pad, the outer surface of base is equipped with pull plate, the outer surface of pull plate is fixedly connected with limit rod, the outer surface of limit rod is sleeved with first spring, one end of limit rod is fixedly connected with blocking block.The utility model, iron body is engaged with base, then bottom plate will extrude blocking block, make blocking block move to the inner wall of base, limit rod is moved simultaneously, and blocking block will compress first spring, when the recess of iron body is opened and is aligned with blocking block, first spring is rebounded to drive blocking block and recess to engage, preliminary fixing of iron body is completed.