A housing includes a bottom shell, a support frame and protection blocks. The support frame is fixed on the bottom shell. The protection blocks are fixed between the bottom shell and the support frame. The support frame includes reinforcement side walls and receiving portions. The receiving portions are defined in the connecting portions of the adjoining reinforcement side walls. The protection blocks are received in the corresponding receiving portions. The bottom shell includes a bottom plate and four side plates extending from a periphery of the bottom plate. The support frame resists the four side plates.