The invention provides a solid material fine crushing and high pressure forming system and process. The system comprises a feed valve for receiving bulk materials and a fine crusher communicated with the feed valve, wherein the lower portion of the fine crusher is communicated with a fine powder buffer bin; a first discharging valve is arranged on the lower portion of the fine powder buffer bin; the lower portion of the first discharging valve is communicated with a forming machine feeding screw; the discharging outlet of the forming machine feeding screw is communicated with the feeding inlet of a forming machine prepressing screw; the discharging outlet of the forming machine prepressing screw is connected to a high pressure double-roll forming machine; a forming machine discharging belt and a vibrating screen classifier connected with the forming machine discharging belt are arranged below the outlet of the high pressure double-roll forming machine; one outlet of the vibrating screen classifier is connected with a transfer belt for outputting formed products, and the other outlet is provided with a third discharging valve communicated with an embedded scraper transporter for sending materials not formed back to the feed valve. The system and process combine and integrate materials screening, fine crushing and forming procedures, the pre-extrusion process is included to exhaust gas, and the defects like bubbles and gas explosion are avoided.