Dimension measuring device

The utility model discloses a dimension measuring device, which is used for measuring the dimension of a battery, the dimension measuring device comprises a workbench, a clamping unit and a detection unit, the clamping unit is arranged on the workbench and comprises a clamping mechanism and an adjusting mechanism, the clamping mechanism is provided with a clamping space used for clamping the battery, the adjusting mechanism is connected with the clamping mechanism, and the detection unit is arranged on the workbench. The size of the clamping space in the first direction is adjusted, the first direction is parallel to the horizontal direction, and the detection unit is used for detecting the size of the battery in the first direction. According to the size measuring device provided by the utility model, the size measuring error of the size measuring device on the battery in a fresh state and a bulge state is relatively small, and the situation that the battery in the bulge state cannot be measured can be avoided.