The utility model disclosed a system for cogenerating chemicals containing nitrogen and coke doped with nitrogen by the rich-nitrogen pyrolysis of biomass. The system comprises a rich-nitrogen pyrolysis subsystem, a coke doped nitrogen subsystem, an external-nitrogen introduction subsystem and a rich-nitrogen gas condensing subsystem, wherein the rich-nitrogen pyrolysis subsystem generates high-temperature fume and triggers the biomass and external nitrogen to carry out a reaction; the rich-nitrogen gas condensing subsystem condenses pyrolysis gases so as to separate out liquid products which are rich in chemicals containing nitrogen, and the liquid products are stored; the coke doped nitrogen subsystem generates high-temperature gasified gases, performs deep processing on coke, and stores cooled coke products; the external-nitrogen introduction subsystem supplies external nitrogen to the rich-nitrogen pyrolysis subsystem and the coke doped nitrogen subsystem, and captures NOx in the absorbed fume. Through the adoption of the system disclosed by the utility model, rich-nitrogen oil and rich-nitrogen coke can be continuously generated, high-value chemicals containing nitrogen and carbon materials for super capacitors can be prepared by a one-step method, and the high-efficiency high-quality conversion of the biomass is effectively promoted.