The preparation method of molded pulp egg boxes using an invasive plant Spartina anglica Hubb as a raw material through thermo-mechanical pulp and composition with chemical pulp. Static compression test was taken on both new material composition and traditional chemical pulps. The results showed that, under the same temperature and humidity conditions, egg boxes made of corrugated cardboard showed the best carrying capacity, it can reach 380 N; products made of the other two material compositions, paper pulp plus spartina anglica Hubb fiber 40wt% and bamboo pulp plus spartina anglica Hubb fiber fiber 30wt% showed excellent carrying capacity, which can reach 302 N and 300 N. It was concluded that using thermo-mechanical pulp of Spartina anglica Hubb as a raw material to compound with chemical pulp to produce molded pulp product has a good application prospect.