A neural network tiling method includes: obtaining a neural network graph, where the neural network graph is used to represent a neural network; tiling the neural network graph to obtain a depth subgraph, where a plurality of vertices included in the depth subgraph exchange data with each other by reading and writing an on-chip buffer, the depth subgraph is used to successively process at least two groups of data obtained by tiling first input data, to obtain first output data, and the first input data is input data of the depth subgraph. In the method, a neural network tiling apparatus tiles a neural network graph to obtain one or more depth subgraphs.