The invention relates to a resource distribution method for a reconfigurable chip multiprocessor with task number and performance sensing functions. The dynamic reconfigurable chip multiprocessor has the capability of dynamically reconfiguring on-chip resources during running, so as to reduce the task average turnover time, improve the system throughput rate and the chip resource utilization rate, and provide a large optimization space. The method has the advantages that in each dispatching interval of an operation system, a resource allocator is used for firstly averagely allocating a logic core according to the task number, sequencing the tasks according to the performances (for reflecting the requirement of the task on the resource) after running for a certain clock cycle, finding the task with small demand on resource, reducing the granularity of the occupied logic core, and allocating the vacant physical core from the task with small demand on resource to the task with high demand on resource, so as to increase the granularity of the logic core occupied by the task with high demand on resource; when the existing load of the system is changed or the task enters the new running phase, the resource allocator will timely make adjustments in the next operation system dispatching, so as to fully utilize the chip resources.