Trailing suction hopper dredger(TSHD) is one of the most widely used ship types in dredging projects,which is suitable for excavation of soil such as mud,clay and even gravel.The soil quality of a port in Tanzania is mainly coral glue sand,its standard penetration number is up to 50 strikes,and it is easy to block,and the blocking head is serious.There are a large number of tires,fishing nets,and anchors on the surface,blocking the rake head seriously.In the process of construction,it is necessary to solve the problem that debris and coral cement sand block up the rake,the working conditions of the two are completely different,and can not be dealt with alone.Based on the analysis of various technical parameters on site,this paper takes measures such as making special cleaning tools,transforming TSHD equipment and improving construction technology to achieve the purpose of improving the construction efficiency of TSHD.It can provide a reference for dredging multi-debris and easy to block soil using TSHD.