In order to evaluate the influences of the bank boundary condition and the river dynamic condition on bank stability, through quantification of qualitative indices and standardization of quantitative indices, comprehensive evaluation functions for bank stability during the dry period and the flood period were created based on the hierarchical framework model and weight coefficients of the factors of bank failures, and a comprehensive evaluation method for bank stability, considering many factors, was put forward. The results of stability evaluation of three reach banks with different soil properties, bank boundary conditions, and river dynamic conditions show that the comprehensive evaluation function and method are suitable for bank stability evaluation.