In view of the severe wear of the cutter teeth in the dredging project of the cutter suction dredger，the carbide material of reamer teeth is heat-treated，and the test of cutter teeth wear is carried out on the “Tianfeng”cutter suction dredger in Rizhao Port. The test soil is clay mixed with coarse sand，and the arrangement is 3 active cutter teeth and 3 new cutter teeth. Two indicators，the wear length and wear weight are used to determine the wear resistance of the cutter teeth，and a comprehensive cost-performance model for the wear resistance of the cutter teeth considering price factors is proposed. The test results show that the wear resistance of the new cutter teeth is about 87% of that of the original teeth under this soil.