The utility model relates to a dynamic command on-chip heterogenous memory resource distribution circuit based on a virtual memory mechanism; an inner core of a processor sends out a virtual address of the command access; the virtual address is converted into a physical address through an internal memory management unit (MMU); the physical address is sent to either a commend Cache controller or a command SPM controller through a a router of the command part according to the flag bit state of a translation lookaside buffer (TLB); if the command SPM controller receives the physical address, a command SPM memory is accessed after the physical address is decoded; a clock module sends out interruption signals during clock interruption, the interruption signals are responded by an interruption controllor, and the command SPM controller is adopted in the interruption processing procedure; the command SPM controller comprises an SPM area register; the command SPM controller is equipped with a source address, a destination address and the conveying length of the DMA controller according to the information of the SPM area register; the DMA controller modifies the contents in the command SPM memory through a high-speed AHB bus and an external memory interface according to the procedure contents in the off-chip main memory SDRAM; and the command SPM controller is equipped with length information of the clock module and controls the clock module at the same time.