The invention relates to a vertebral body interval measurer belonging to the technical field of medical equipment and comprises left and right arms (1), an arc scaleplate (2), a rotating shaft (3) and a spring (4). The left arm and the right arm are both divided into two parts, namely front arms (11) and rear arms (12). The bent parts of the left arm and the right arm are respectively provided with a rotating shaft hole, the rotating shaft (3) penetrates through the rotating shaft hole to connect the left arm and the right arm, the tops of the front arms of the left arm and the right arm are provided with contact points (13), and the tail ends of the rear arms of the left arm and the right arm are respectively provided with a scaleplate hole. One scaleplate hole is used for fixing one endof the arc scaleplate (2), and the other scaleplate hole is used for being penetrated by the free end of the arc scaleplate. The spring is bent in a U shape, the middle part of the spring is fixed tothe rotating shaft (3), and the two ends of the spring are respectively fixed in grooves (14) in the inner sides of the rear arms of the left arm and the right arm. The vertebral body interval measurer can rapidly and accurately measure the vertebral body interval and successfully cut titanium nets at one time, thereby saving material, accelerating operations, improving the operation quality, andalso reducing the pain of patients.