Abstract: At the conclusion of design experience, combined in civil construction in the electrical design issues frequently encountered by the paper on the main hospital building in the electrical design of the following questions: 1, through different forms of wiring fault occurred when the current flowing through the human body, discussed the use of the operating room for patients isolated power system provides a reliable security The isolation and detailed description of the composition of power supply system 2, a more detailed exposition of the various functional integrated ward floor area electrical design 3, by the nature of lightning current, lightning current distribution, in line with the state of existing norms mine classification of the building from the proposed mine measures four aspects are the main anti-lightning directly stroke, mine electric sensors, mine waves penetrated and anti-magnetic pulse 4, in order to effectively reduce human exposure voltage, and can effectively eliminate foreign economic relations since the building of electrical lines and metal pipes into buildings dangerous fault voltage hazards, such as potential connection to further protect the buildings used electrical