Embodiments of the present invention provide an application upgrade method and an apparatus. The application upgrade method includes: receiving an application deployment request; determining a deployment package of a to-be-deployed application; determining that a version of a first platform node is below a version requirement of a node template of the to-be-deployment application for a first platform node template; acquiring a first platform node upgrade package that meets the version requirement of the node template of the to-be-deployed application for the first platform node template; upgrading the first platform node indicated by an identifier of the first platform node by using the first platform node upgrade package; determining an identifier of a to-be-upgraded application node; and upgrading the application node indicated by the identifier of the to-be-upgraded application node by using the deployment package of the to-be-deployed application.