The paper aims to study the variation rule of the top arc dynamic envelope angle of corrugating roller, and optimize parameters of corrugated roller. In this paper, a dynamic enveloping angle equation of corrugating roller in forming of corrugated board was established to calculate the dynamic wrap angle corresponding to each different rotation angle with Matlab, to determine the variation rule of the angle of inclusion in a meshing period and its influence parameters. The enveloping angle of corrugated rolls with different corrugated shape parameters had different changing rules during operation, and the changing rules were consistent with the measured working conditions. The abrupt change of dynamic wrapping angle would cause the vibration and noise of the corrugated paper forming process, increase obvious sly, reduce the forming quality and shorten the machine life. The dynamic total envelope angle equation established in this paper is consistent with the actual forming process of corrugated board, which lays a theoretical foundation for the optimal design and error analysis of corrugated rolls.