The invention discloses a modularized double-active-bridge converter system. The system comprises a left part, a middle part and a right part, wherein the middle part is electrically connected with the left part, the right part is electrically connected with the middle part, the left part comprises a plurality of DC/AC inverters, the input ends of the plurality of DC/AC inverters are sequentially connected in parallel, the middle part comprises a plurality of medium-high frequency transformers, the right part comprises a plurality of AC/DC rectifiers, the output ends of the plurality of AC/DC rectifiers are sequentially connected in series, and one DC/AC inverter, one medium-high frequency transformer and one AC/DC rectifier form a group of dual-active-bridge converter modules. By adopting the technical scheme, the balanced control of the series-parallel combined system containing more modules can be achieved without information communication among the modules, and the voltage dynamic response of the series ports of the modules can be kept consistent, thereby facilitating the stable operation of the whole combined system.