Elastic modulus of corrugated laminated paper for four-ply corrugated board was deduced based on micromechanics analysis of composite material. Considering the effect of adhesive between two layers of base paper, the relationship between corrugated laminated paper's longitudinal elastic modulus and volume fraction as well as of the adhesive was analyzed. Verification experiments were carried out. The purpose was to provide reference for further theoretical analysis of four-ply corrugated paperboard.