The utility model discloses a chain with flanges on outer chain sheet. The chain comprises a group of series-connection units which are formed by series connection; each series-connection unit comprises a chain roll, inner chain sheets arranged at the two sides of the chain roll, outer chain sheets arranged at the outer sides of the inner chain sheets and pin shafts for connecting the chain roll, the inner chain sheets and the outer chain sheets; flanges are arranged at orifices of the outer chain sheets, so that the material cost is reduced while the strength of the outer chain sheets is increased; one set of production equipment can be shared by the inner chain sheets and the outer chain sheets to reduce the manufacture cost; and in addition, as the lateral arc-shaped chamfer is designed in the connecting orifices, much fewer outer chain sheets are cracked up in the production assembly process of the chain, and the production efficiency is improved.