Width measurement mechanism

The invention relates to a width measurement mechanism, which comprises a flange, a push rod, a gauge body, a first measurement rod, elastic blocks and a second measurement rod. Installation grooves are arranged on two lateral sides of the gauge body, the elastic blocks are in slide connection in the installation grooves, the elastic blocks and the gauge body are in clearance fit, an elastic deformation portion and an adhesion measurement ball are arranged on each elastic block, and installation holes are positioned on the elastic blocks. The first measurement rod and the second measurement rod are respectively arranged in the installation holes, the first measurement rod and the second measurement rod are in interference fit with the elastic blocks, an inclined groove is arranged at one end of the first measurement rod, an inclined face is arranged at one end of the second measurement rod, and the inclined face and the inclined groove are used for limiting the push rod. The push rod extends out of the gauge body into the flange, and a limit protrusion is arranged on the portion of the push rod in the flange. The width measurement mechanism is simple and compact in structure, highin measurement accuracy, simple in operation and capable of quickly measuring variation of measured width and enabling measurement equipment to be capable of measuring sizes of higher grades.