An embodiment of the present application relates to a communication method and apparatus, the method comprising: sending first information to a terminal device, the first information indicating the maximum number of transmission blocks that can be scheduled by downlink control information; indicating to the terminal device the HARQ process number corresponding to one or more transmission blocks scheduled by the downlink control information within the value range of the HARQ process number; when indicating to the terminal device the HARQ process number corresponding to one or more TBs scheduled by the downlink control information, in one implementation manner, the HARQ process number corresponding to a transmission block and the number of transmission blocks actually scheduled by the downlink control information are used to determine the HARQ process number corresponding to each scheduled TB, thereby reducing the bit overhead of the downlink control information, and at the same time, the value of the HARQ process number corresponding to the transmission block is not fixed, thereby ensuring the flexibility of scheduling multiple transmission blocks.