As the key technology in the environmental dredging project,the mud flocculation construction with belt filter press is affected by many factors,such as mud concentration,flocculants selection,dosage and flocculation time.Under the condition of choosing selected type of belt filter press,mud characteristics and flocculants,the relevant technical study and improvements are made on Nanhu environmental dredging construction project in Wuhan.It can save the use of flocculants,reduce the workload,and improve construction efficiency and quality in the mud flocculation as well as in the entire environmental dredging dehydration curing section.