The invention discloses a carbon fiber microchip reactor. The carbon fiber microchip reactor is a multi-layer structure, and comprises a heat conducting or electricity conducting layer, an upper-layer carbon fiber blanking plate, a carbon fiber reaction channel layer, a lower-layer carbon fiber blanking plate and a second heat conducting or electricity conducting layer sequentially from top to bottom, wherein the carbon fiber reaction channel layer comprises a micro-channel for chemical reaction of fluid; the carbon fiber reaction channel layer, the upper-layer carbon fiber blanking plate and the lower-layer carbon fiber blanking plate are all made of carbon fiber plates. The carbon fiber microchip reactor has the following advantages: 1. the reactor has light weight and is portable; 2. the reactor has extremely high corrosion resistance and can resist acid and base; 3. the reactor has ultra high heat conducting property; 4. the reactor can be formed in one time conveniently, so that the mass production is realized, and the requirement of equipment of development tendency of a chemical process in future is met.