Single support rail stand detector for assisted detection of rail slab grinding size

The utility model discloses a single support rail stand detector for assisted detection of rail slab grinding size. One end of a spacing connecting rod is connected to a left measuring block via a left lock nut, the other end of the spacing connecting rod is connected with a right measuring block via a right lock nut, and the two ends of the spacing connecting rod are both provided with outer threads; inner cavities of one end of the left measuring block and one end of the right measuring block are provided with inner threads, and gradient of the end face of the other end of the left measuring and gradient of the end face of the other end of the right measuring block are the same with that of a designed rail cant; and the left lock nut and the right lock nut are screwed onto the spacing connecting rod and tightly lock the same. The detector is capable of detecting small jaw distance of a single support rail stand with measurement accuracy reaching 0.05mm. The detector has the advantages of meeting accuracy re