The standard penetration test blow count of the dredged mud in dredging project of Lyusi Port in Qidong ranges from 6 to 18,which belongs to 9 grade sandy soil type.By comparison,we choose the layered construction process,but the dredging mud has a large number of standard penetration test blow count,which seriously affects the production efficiency of the “Junze” dredger.We study the dredging equipment of “Junze” dredger,carry out some statistics of staged production data and effect analysis,propose the corresponding improvement measures,and compare with the effect before improvement.The results show that removing the short joints of 15° angle in cutter section can increase the equipment productivity and time utilization ratio,and reduce the fuel consumption significantly.Replacing with longer cutter teeth helps to increase the daily work quantity of single tooth,construction capacity of dredger and wear time.