To improve recycling efficiency of waste Tetra Pak package and enlarge its application in packaging field, the optimum hot-pressing process of waste Tetra Pak / wood composite board was studied. Orthogonal experimental method was applied in the study. Resin content, hot-pressing temperature, hot-pressing time, and Tetra Pak / sawdust mass ratio were taken as influencing factors; MOR, MOE, and expending rate after 2 h water absorption was taken as inspection index. The optimum hot-pressing process parameters were obtained from the experiments. The results showed the optimal process parameters for the board were resin content for 14% , hot-pressing temperature 150 ℃ , hot-pressing time 420 s, and Tetra Pak / sawdust mass ratio 4 : 6; under this condition, the maximum MOR of the board is 23. 1 MPa; the maximum MOE is 2917 MPa; and the minimum expending rate of the board after 2 h water absorption is 6. 1% .