The invention relates to a trigger switch for wearing a safety belt, which comprises at least one stationary contact and at least one moveable contact; a trigger signal can be generated by contacting two contacts; and the stationary contact is arranged on a safety belt suspension shaft at the fixed point on the safety belt; and the movable contact is arranged on the safety belt mesh belt. Compared with the prior art, the invention has the advantages of wide application range, safety and reliability, convenient realization and convenient examination and repairing and the like.