This application provides a communication method and apparatus. According to the method, a first terminal apparatus can determine, based on second information, information that is in first demodulation information and second demodulation information and that is used to demodulate a first data stream, and determine information that is used to demodulate a second data stream. The first data stream is a common stream, and the second data stream is a private stream of the first terminal apparatus. The first terminal apparatus may first demodulate, based on the information that is used to demodulate the first data stream, a signal received by the first terminal apparatus on a first resource, to obtain the first data stream, and then may obtain the second data stream based on the first data stream, the information that is used to demodulate the second data stream, and the signal received on the first resource.