The invention discloses a magnetic portable screwdriver capable of illuminating. The screwdriver comprises a movable holding handle, a fixed holding handle, a battery, a connecting shaft, a switch, amain connecting head, a clamping groove body, a transmission clamping block 1, a connecting device, a transmission clamping block 2, a turning device, an illuminating lamp, a clamping pin, an operation piece, a groove, a screwdriver bit and a top cover. The screwdriver is reasonable and simple in structure and low in production cost; the screwdriver can be divided into three detachable parts, so that the screwdriver is convenient to carry after disassembly; through arrangement of the illuminating lamp, the screwdriver can be used in a dark place, so that the practicability of the screwdriver is improved; the connecting device can be connected into the fixed holding handle; then, the needed screwdriver bit is directly inserted in a clamping groove 2 for use; the screwdriver bits with different specifications are all stored in an inner cavity of the movable holding handle to prevent the loss phenomenon of the screwdriver bits; in addition, the provided turning device can be connected below the connecting device; and then, the needed screwdriver bit is directly inserted in a clamping groove 4 for use.