On the basis of a previous model of radiative-Auger-cascade for calculation of final-charge-state distributions of hollow ions, a new model of radiative-Auger-double Auger-cascade has been constructed by including double Auger process, and was applied to study the final-charge-state distribution in the production of Ar+(1s-1) (argon ion with an initial 1s hole) and Ar+(2s-1) (argon ion with an initial 2s hole). Comparing with the previous calculations and experiments, the present results show excellent agreement.