Abstract: Agricultural product primary processing is an important basis for modern agriculture to strengthen industrial chain, optimize supply chain and enhance value chain．Through a combination of theoretical analysis and field research, current situation of mechanization in agricultural product primary processing in Beijing was analyzed and sorted out by region, industry, variety, and link（hereinafter referred to as the "four-division study"）．Shortcomings and weaknesses in development of agricultural product primary processing mechanization were identified, main factors affecting level of agricultural product primary processing mechanization in Beijing City were analyzed, and countermeasures and suggestions were proposed．