KVM switching system and method for realizing high integration level based on FPGA

The invention discloses a high-integration-level KVM switching system and method based on an FPGA. The system comprises a switching control module, an instruction receiving module, an image frame caching module, a display coding module, a USB switching module, a startup and shutdown switching module and a decoding module. Wherein the switching control module, the instruction receiving module, the image frame caching module and the display coding module are all integrated in the FPGA chip, the integration level is high, space and cost are saved, and meanwhile the operation speed is high; the display coding module runs according to an output time sequence, continuously reads cached frame image data from the image frame caching module, converts the cached frame image data into HDMI image data, and outputs the HDMI image data to display equipment, so that seamless switching and no blank screen phenomenon are ensured; in addition, switching of the USB peripherals and switching of startup and shutdown can be achiev