A minicore-based reconfigurable processor and a method of processing multiple data using the same are provided. Reconfigurable processor technology can use existing resources to flexibly form single instruction multiple data (SIMD) without the need to increase data width or additionally consume computing power. The reconfigurable processor includes two or more minicores, each of the minicores including two or more function units configured to perform different operations. The reconfigurable processor further includes a processing unit configured to activate two or more function units of two or more respective minicores, that are configured to perform an operation of an SIMD instruction. Thus, the reconfigurable processor can flexibly support SIMD.