The present invention discloses a multi-core processor and an inter-core data forwarding method. The multi-core processor includes a plurality of processor cores and a multi-core interconnection bus. The multi-core interconnection bus includes: a plurality of request processing interfaces, each of which is adapted to receive a read data request sent by a coupled processor core, and send the read data request to a request storage unit; and the request storage unit, adapted to receive the read data request sent by the request processing interface, and forward the read data request to another request processing interface, where the request processing interface receives a read data request forwarded by the request storage unit, sends the read data request to the coupled processor core, receives a request result that is returned by the processor core by reading a cache of the processor core, and sends the request result to a request processing interface coupled to a processor core that initiates the request; and receives a request result sent by the another request processing interface, determines valid data based on the received request result, and sends the valid data to the coupled processor core.