Abstract: Embodiments of this application disclose a node fusion method for a computational graph and a device. The method includes: converting a neural network into a computational graph; extracting one or more parallelizable branch groups from the computational graph based on a dependency relationship between nodes in the computational graph, where the dependency relationship indicates at least one of the following relationships: the parallelizable branch group has a common parent node, the parallelizable branch group has a common child node, the parallelizable branch group has no parent node, and the parallelizable branch group has no child node; and finally, fusing a plurality of nodes in any parallelizable branch group that respectively belong to different sub-branches to obtain a new computational graph.