There were many difficulties for measuring Poisson′s ratio of corrugated paper. It was hard to satisfy the determination of requirements with the traditional contract method. A simple and efficient way had not been proposed to solve this problem. For disadvantages of the traditional method to measure displacements, digital image correlation method was proposed to measure Poisson′s ratio of corrugated paper. The images taken before and after samples deformed were analyzed about related displacements. Composing measured displacements in the experiment with calibration ones led to highly coincident result. The relative error was from 1%~3%. The Poisson′s ratio of corrugated facing paper in MD and CD were 0.175 and 0.073, respectively. The one of corrugated medium in MD and CD were 0.275 and 0.119, respectively. Test and analytic results showed that DIC was feasible, and had actual using value, and was a new approach to test and investigate Poisson′s ratio of paper.