A data stream processing method, comprising: using a precoding parameter to perform precoding processing on an l th to-be-sent data stream of a current k th transmitting device, wherein the l th to-be-sent data stream comprises a lattice point data stream mapped to a lattice grid and the l th to-be-sent data stream further comprises a disturbing data stream that disturbs the lattice point data stream by using a disturbance parameter; sending the precoded l th to-be-sent data stream to a k th receiving device, wherein both l and k are positive integers; and wherein the method further comprises: obtaining the precoding parameter, an interference alignment quantization parameter, a first equalization parameter, a second equalization parameter, and an interference parameter that correspond to the l th to-be-sent data stream; obtaining a disturbance parameter and an interference alignment quantization parameter that correspond to every to-be-sent data stream of every transmitting device; obtaining an aggregate interference alignment quantization parameter according to the disturbance parameter and the interference alignment quantization parameter that correspond to every to-be-sent data stream of every transmitting device; and sending the first equalization parameter, the aggregate interference alignment quantization parameter, the second equalization parameter, and the interference parameter to the k th receiving device. using a precoding parameter to perform precoding processing on an l th to-be-sent data stream of a current k th transmitting device, wherein the l th to-be-sent data stream comprises a lattice point data stream mapped to a lattice grid and the l th to-be-sent data stream further comprises a disturbing data stream that disturbs the lattice point data stream by using a disturbance parameter; sending the precoded l th to-be-sent data stream to a k th receiving device, wherein both l and k are positive integers; and wherein the method further comprises: obtaining the precoding parameter, an interference alignment quantization parameter, a first equalization parameter, a second equalization parameter, and an interference parameter that correspond to the l th to-be-sent data stream; obtaining a disturbance parameter and an interference alignment quantization parameter that correspond to every to-be-sent data stream of every transmitting device; obtaining an aggregate interference alignment quantization parameter according to the disturbance parameter and the interference alignment quantization parameter that correspond to every to-be-sent data stream of every transmitting device; and sending the first equalization parameter, the aggregate interference alignment quantization parameter, the second equalization parameter, and the interference parameter to the k th receiving device. obtaining the precoding parameter, an interference alignment quantization parameter, a first equalization parameter, a second equalization parameter, and an interference parameter that correspond to the l th to-be-sent data stream; obtaining a disturbance parameter and an interference alignment quantization parameter that correspond to every to-be-sent data stream of every transmitting device; obtaining an aggregate interference alignment quantization parameter according to the disturbance parameter and the interference alignment quantization parameter that correspond to every to-be-sent data stream of every transmitting device; and sending the first equalization parameter, the aggregate interference alignment quantization parameter, the second equalization parameter, and the interference parameter to the k th receiving device.