Qingyu and Tianzhong UHVDC systems have formed a multi-UHVDC transmission system with similar sending and receiving paths. This results in more complex network topologies and stronger interdependencies between subsystems at both ends. Consequently, the issues of fault interaction and coordinated recovery have become key focal points in current system stabilization research. This paper quantitatively analyzes the voltage interaction characteristics among the subsystems of multi-UHVDC systems and revises the multi-UHVDC voltage interaction factor (MDC_VIF) and the multi-UHVDC effective short circuit ratio (MDC_ESCR) to better suit the evaluation of such systems. Subsequently, a practical calculation method of multi-UHVDC coordinated recovery factor (MDC_CRF) is derived. Then a multi-UHVDC coordinated recovery strategy is proposed with the recovery order guided by MDC_CRF and fitted by the control of the nonlinear voltage dependent current order limiter of each subsystem. Finally, simulation tests based on an equivalent model of a multi-UHVDC show that the proposed coordinated recovery strategy has optimal control effect, and the derived multi-UHVDC coordinated recovery factor is highly practical for engineering applications.