The invention provides a data distribution method of a heterogeneous network. The heterogeneous network at least includes a first network and a second network which are different wireless networks. The method includes the following steps: if the second network has residual capacity and has the MU-MIMO capability, the first network is excessively loaded or is jammed, the first network unloading and distributing part of user data of the first network to the second network; and the second network transmitting the user data unloaded and distributed by the first network. According to the invention, the method makes the most of MU-MIMO, compensates largest number of a communication network MU-MIMO with less signaling overheads, and increases utilization rate of resources and handling capacity of a system.