A data transmission circuit and method, a core, a chip with a multi-core structure, an electronic device and a storage medium are provided. The data transmission circuit includes a receiver, a controller, a lookup table circuit and a selector. The receiver is configured to receive an original data packet from Fabric; the controller is configured to determine whether the original data packet needs to be relayed according to an original control bit, and control a first input terminal of the selector to be enabled in response to that the original data packet needs to be relayed; the selector is configured to send a new data packet to the Fabric via the first input terminal, wherein the new data packet includes the original data and a new header acquired by the lookup table circuit according to an original index. In this way, power consumption of the data transmission circuit is reduced.