Abstract: The simplified methods for reliability index calculation and design of the gravity quay against sliding and overturning without wave force is investigated in the study. Probabilistic distribution and statistical parameters of the load and resistance regarding sliding and overturning are established through Monte-Carlo simulation and statistical analysis; and the simplified methods and expressions for the reliability index calculation of the gravity quay against sliding and overturning are put forward. Coefficients in the simplified reliability index expressions are determined through reliability analysis of 11 block quays， 8 buttressed quays and 25 caisson quays using JC method. The research results indicate that for the same type of the gravity quay， the bias and variation coefficients of the load effects and resistances for sliding and overturning are approximately identical. The results of reliability index obtained by simplified expressions are very close to the results obtained by JC method.