Air gap measurement tools

The invention discloses an air gap measurement tool. The air gap measurement tool comprises a connecting rod; the front end of the connecting rod is provided with an elastic clamping piece; the front part of the elastic clamping piece is provided with a pair of measuring rods which can be folded and unfolded to two sides around a supporting point between the two measuring rods; after the rear parts of the two measuring rods are clamped by the elastic clamping piece, the front parts of the two measuring rods can be unfolded to two sides; and the connecting rod is provided with a folding device which can make the front parts of the two measuring rods inwards folded. With the air gap measurement tool adopted, online adjustment and measurement can be performed according to the sizes of air gaps, according to a traditional measuring mode, a measuring tool is taken out from a motor frequently so as to be adjusted and extends into an air gap to measure the air gap, the measuring mode can be eliminated, and therefore, fast measurement of the air gaps can be realized, and the efficiency of measurement work can be greatly improved.