Clayey soil from waterway regulation engineering is used as the main raw material to prepare clay-based solidified material. The traditional inorganic combinative material such as cement,gypsum lime and slag are used as solidified agents. The results show that the optimal mixing ratio of clay solidified material is 65% of clayey soil,18% of cement,2.0% of gypsum,and 3.0% of lime. The 28 d compressive,splitting tensile and the immersion strength of the solidified material are 25.6 MPa,2.5 MPa and 24.1 MPa respectively. This solidified material can replace ordinary concrete to make ballast block used in port and waterway engineering and meet the needs of hydraulic applications.