The invention relates to a cluster task resource allocation method for a multi-core processor. In the method, CPU resource nodes are used as basic allocation units for task allocation according to operation tasks submitted by receiving users to a cluster, and a task resource allocator is formed. The task resource allocator maps resources on the cluster to an M*N matrix AR. When idle resource positions are searched for the tasks, in the method, the tasks are uniformly dispersed and required resources are allocated to the nodes, so that the resource node positions occupied by all tasks are spaced. The method avoids the problem that tasks are excessively concentrated in one certain area, a large amount of heat energy is concentrated in the area as time goes by, the temperature of a local chip is too high, and the normal operating efficiency of a computer is influenced in the traditional task allocation algorithm. The task scheduling algorithm adopted by the method is an online real-time task scheduling algorithm and has good application prospects in the operation and task management of a multi-core processor cluster system.