Gauge for first section of track chain and detection method thereof

The invention discloses a gauge for the first section of a track chain and a detection method thereof. The gauge for the first section of the track chain and the detection method thereof can be used for quickly and precisely detecting the processing precision of the first section of the chain. The first section of the chain comprises two opposite chain sheets, and each chain sheet has a large shaft hole, a small shaft hole and a mounting groove. The gauge comprises a gauge body, the gauge body comprises detection heads matched with the mounting grooves and a detection rod matched with the small shaft holes, each detection head has a first reference surface fitting with the bottom of the corresponding mounting groove and a second reference surface fitting with the side wall of the corresponding mounting groove, and the detection rod is a column vertically connected with the first reference surfaces of the detection heads.