Test paper quantity statistics device and working method thereof

The invention discloses a test paper quantity counting device and a working method thereof. A support, a sliding rail, an upper baffle and a lower baffle are arranged, wherein the upper baffle can move up and down along the sliding rail, a distance between the upper baffle and the lower baffle is adjusted, test papers with different thicknesses can be measured, a first polar plate and a second polar plate of a capacitive sensor are respectively arranged at the bottom of the upper baffle and the bottom of the lower baffle, the capacitance measured by the capacitance sensor is changed by utilizing different thicknesses of media between polar plates of the capacitance sensor, the thickness of a test paper between the upper baffle and the lower baffle is measured, therefore, the number of testpapers is calculated, the upper baffle capable of moving along a slide rail can compact a to-be-tested roll, the upper baffle is supported on the support through the sliding rail, the upper baffle can only move in the direct