Electric screw driver for construction and installation

The utility model belongs to the technical field of electric screwdrivers, and particularly relates to an electric screwdriver for construction and installation, which solves the problems that a tool bit is easy to lose and is inconvenient to install in the prior art. The notch in one side of the screwdriver head on the screwdriver body is aligned with the notch in the screwdriver holder, the screwdriver head is pressed towards one side, the limiting block moves outwards when the push block is pressed, the screwdriver head loses limiting, and therefore the screwdriver head is pushed upwards; then the tool apron is rotated to replace the tool bit needing to be used to the corresponding position, the tool bit is pulled out outwards and then pushed downwards, the tool bit is pressed downwards along the inclined block, the first spring pushes the inclined block to push the tool bit outwards, the push block is loosened, the limiting block loses limiting and slides into the tool bit, the tool bit is fixed, the stru