The utility model discloses a no master-slave self current-balancing grid-connected parallel uninterrupted power system, belonging to the power electronic technology field. The no master-slave self current-balancing grid-connected parallel uninterrupted power system is mainly composed of two or more parallel same uninterrupted power system units, and each uninterrupted power system unit comprises four single-phase full bridge converters(H1-H4), three industrial frequency inductors(LS, L1, L2), a high frequency inductor(L), a DC filter capacitor(C1), an AC filter capacitor(C2), an isolating transformer(T), two bidirectional thyristors(K1, K2), an air switch(B) and a storage battery(VB); the input side of each uninterrupted power system unit is connected with a power grid via the air switch(B), the uninterrupted power system units are in parallel connections after passing through a second industrial frequency inductor(L1), a third industrial frequency inductor(L2) and the AC filter capacitor(C1), and are connected with the power grid via the two bidirectional thyristors(K1, K2). The no master-slave self current-balancing grid-connected parallel uninterrupted power system of the utility model enables bidirectional energy flow to be carried between an uninterrupted power supply and the power grid, and is a green load relative to the power grid, and enables the efficiency and a dynamic response speed of a parallel system to be improved at the same time.