Dual-core honeycomb paperboard was designed to solve the conflict between cost and compressive strength of honeycomb paperboard. Based on the processing technology of singie-core paperboard, the processing technology of dual-core honeycomb was determined. 20 mm thick dual-core honeycomb samples was produced, which was composed of 110 g/m2 and 220 g/m2 paper core. The flat crush resistance was measured. The results showed that the flat crush resistance of the dual-core honeycomb paperboard has been substantially improved.