Embodiments of the invention relate to a resource allocation method of a central processing unit and a computing node. The resource allocation method comprises the following steps: dynamically adjusting the allocation quantity of physical cores in a high-level resource pool based on the change in the number of virtual machines in the high-level resource pool; and adjusting the allocation quantity of the physical cores in a default resource pool based on the allocation quantity of the physical cores in the high-level resource pool, wherein the high-level resource pool and the default resource pool are resource pools obtained by dividing the physical cores of the central processing unit according to service levels of the resource pools. According to the embodiments of the invention, the physical cores are divided into different resource pools, and computing resources of the physical cores in different resource pools are isolated from one another, so as to realize effective allocation of the computing resources of the physical cores for different application scenes.