An inter-core communication method includes a first inter-core processing circuit of a first processor receiving an inter-core message sent by a first core of the first processor, determining that a target core indicated by the inter-core message is a second core of a second processor, and sending the inter-core message to a first cross-processor communication agent circuit of the first processor, the first cross-processor communication agent circuit sending the inter-core message to a second cross-processor communication agent circuit of the second processor, the second cross-processor communication agent circuit sending the inter-core message to a second inter-core processing circuit of the second processor, and the second inter-core processing circuit sending the inter-core message to the second core.