The invention discloses a portable electric power tool box. The portable electric power tool box comprises a first box body, a second box body, a third box body, first connecting rods, second connecting rods, third connecting rods, connecting buckles and a box cover, wherein one ends of the first connecting rods are hinged to the outer side of the first box body through the connecting buckles, the other ends of the first connecting rods are hinged to the outer side of the second box body through the connecting buckles, one ends of the second connecting rods are hinged to the first box body through the connecting buckles, the middles of the second connecting rods are hinged to the second box body through the connecting buckles, the other ends of the second connecting rods are hinged to the third box body through the connecting buckles, one ends of the third connecting rods are hinged to the second box body through the connecting buckles, the other ends of the third connecting rods are hinged to the third box body through the connecting buckles, and the box cover is hinged to the first box body through the connecting buckles. The portable electric power tool box is convenient to carry and transport, and in addition, the consumption of time and physical power when a worker carries the electric power tool box can be greatly reduced.