The invention discloses a multifunctional maintenance device for daily maintenance by an electrician. The multifunctional maintenance device for daily maintenance by the electrician comprise a shell, a motor, a battery case, a battery, a switch, a first gear, a first connecting shaft, a second gear, a second connecting shaft, a spindle, a rectangular hole, a spring, a rectangular component, a clamping sleeve, a clamping device, a groove body, an operating component, a magnet, a guide rail, screwdriver bit assemblies, a guide groove, a check block, a driven bevel gear and a driving bevel gear. The multifunctional maintenance device for daily maintenance by the electrician is reasonable and simple in structure, low in production cost and convenient to mount; before use, a screwdriver bit needing to be used is selected firstly, then the corresponding screwdriver bit assembly is moved to the right side of the guide rail along the guide rail, the operating component is moved leftwards to make the clamping sleeve move leftwards, a rectangular protrusion on the left side of the corresponding screwdriver bit assembly is clamped into the clamping groove in the right side of the clamping sleeve accordingly, and by arranging the clamping device, the situation that the screwdriver bit in use is affected due to the fact that other screwdriver bit assemblies move to the right side of the guide rail can be effectively prevented.