Coral-reef limestone is a special type of rock and soil,and studying its engineering mechanical property has great significance to promote the construction of coastal coral-reef area.We compare the engineering property differences between coral-reef and normal sand,obtain the limitation of calculating the settlement of coral-reef limestone foundation by the method of port engineering specification.Based on the above,we use the Schmertmann empirical (semi-empirical) formula method and SPT method from Europe standard to re-check the foundation design for a completed gravity wharf project in Sultan.The results show that empirical (semi-empirical) settlement calculation method based on SPT value has strong operability and applicability,and it can provide references for the similar projects.