The rock integrity is not taken into consideration when classificating the dredged engineering rock by the existing codes.To solve this problem,a method suitable for dredged rock classification is sought.This paper explains the mechanism and method of the pressuremeter test and the applicability of marine survey,analyzes the relationship between pressuremeter test pressure and the strength and integrity of the rock,and concludes that pressuremeter test can comprehensively reflect the characteristics of dredged soft rock.Combined with the basic rock classification,a classification system suitable for soft rock of dredging projects is constructed.It is applied to the soft rock survey of Safi Newport in Morocco to provide data support for ship selection and productivity estimation.