The utility model discloses an induction alarm preventing the entrance to a dangerous area by mistake for an electric construction process, and belongs to the technical field of induction alarm equipment. The induction alarm comprises a strong magnetic sucker base, a micro-moving sensor and an audible-visual alarm are fixedly arranged on the strong magnetic sucker base, a protective cover is also arranged on the strong magnetic sucker base, and the micro-moving sensor and the audible-visual alarm are positioned in the protective cover. The induction alarm can actively remind operation personnel and passers-by in a construction process at the spot, and effectively prevents the operation personnel and the passers-by entering the dangerous area. In the construction process of an outage circuit in a one-tower double-circuit line with one electric circuit and one outage circuit, the operation personnel is prevented from entering the electric circuit, and electric shock accidents of the personnel can be prevented.