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As an important branch of pile foundation, rock-socketed pile has been widely used in the field of foundation engineering, and its vertical bearing capacity is generally considered to be composed of two parts: pile side friction resistance and pile end resistance. In this paper, a total of 62 groups of rock-socketed pile vertical ultimate bearing capacity comparison test data using traditional static load method and self-balancing method in 5 actual projects were collected. After normalizing the test data, Bayesian optimization was used to calculate the statistical parameters of the model factors obeying the log-normal distribution. The appropriate reliability index solution method was selected to calculate the reliability index of the vertical bearing capacity of rock-socketed piles corresponding to different self-balancing conversion coefficients. The ratio of live load effect to dead load effect, safety factor and statistical parameters of load effect were discussed. The influence of factors on reliability indicators. The appropriate target reliability of the vertical bearing capacity of rock-socketed piles is determined according to various industry norms and the most unfavorable principle, and the recommended value of the self-balancing conversion coefficient corresponding to the target reliability is given. [ABSTRACT FROM AUTHOR]