GB/T 12914-2008 "Determination of Tensile Strength of Paper and Cardboard" stipulates the measurement method of tensile strength of paper and Cardboard, including two methods: constant speed tensile method and constant speed loading method. The test principle, equipment, sample preparation, test steps and result calculation are described in detail, which provides a unified standard for accurate determination of tensile performance of paper and Cardboard, and is of great significance for evaluating paper mass, guiding paper production and application.