The Digital Tissue Thickness Tester is a precision measuring instrument designed for thickness measurement of ultra-thin sheet materials such as tissue paper and non-woven fabrics. It is an indispensable testing device for tissue paper production, scientific research, and quality supervision industries. The instrument offers a measuring range of 0-10 mm with a resolution of 0.001 mm, indication error of ±0.003, indication variation ≤0.003, and measuring parallelism ≤0.004 mm. It features a large contact area of 1000±5 mm² and an ultra-low contact pressure of only 2±0.1 kPa, optimized for soft and easily compressible materials to prevent compression deformation during measurement. The device is equipped with a 5-inch touchscreen supporting Chinese and English interfaces, and offers automatic continuous measurement, single measurement, data statistics, printing, data saving, and bulk calculation functions. It has a built-in modular thermal printer and standard RS232 communication interface (USB/WiFi optional). The instrument body adopts an integrated structure, with upper and lower measuring anvils processed by military-grade precision grinding to fully ensure dimensional stability and measurement parallelism, making it an ideal testing device for quality control in the tissue paper industry.