Electrical timing connection device for building construction

The invention discloses an electrical timing switch-on device for building construction, and relates to the technical field of switch-on devices, the electrical timing switch-on device for building construction comprises a time switch shell and a rear cover plate, a relay is arranged in the time switch shell, an armature is arranged in the relay, a movable contact plate is arranged on the armature, and the movable contact plate is connected with the rear cover plate. According to the time control switch, the wedge-shaped block and the connecting box are arranged in the time control switch shell, then the wedge-shaped block and the connecting box are matched, then alcohol or solvents such as ethyl alcohol are conveyed into the first sponge block, the first sponge block and the second sponge block are matched, and therefore the time control switch is convenient to use. Through back-and-forth movement of a first sponge block, contacts on a movable contact plate, a normally-closed contact plate and a normally-ope