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To discuss the quality of fermentation caragana powder for substrate production, the randomized block design was adopted. Taking caragana powder as main raw material, dried chicken manure, cake and urea as nitrogen sources, and cellulose degrading bacteria as exogenous microorganisms, the effects of type and proportion of nitrogen on fermentation performance parameters of caragana powder for substrate production were studied. The results showed that the type and proportion of nitrogen sources had a significant impact on caragana powder matrix fermentation composting decomposed velocity and products. With 75% organic fertilizer+25% chemical fertilizer and 50% organic fertilizer +50% chemical fertilizer treatment of caragana powder pile faster, duration of high temperature was long (>50℃, reached to 10d and 9d, respectively,>55℃, reached to 6d), accumulated temperature was high, and maturity of powder caragana time was short. The total organic carbon were 355.54g/kg and 359.86g/kg, total nitrogen were 22.36g/kg and 0.385g/kg, nitrate nitrogen were 22.21g/kg and 0.337g/kg, ammonium nitrogen were 0.049g/kg and 0.051g/kg, carbon and nitrogen rate was 14.69% and 14.35% respectively. The cellulose and hemicelluloses degradation rate were over 44%, lignin degradation rate was over 37%, humic acid content were 37.12% and 37.08% respectively. The decomposition of organic matter caragana powder and cellulose degradation was accelerated. The composting of total nitrogen and nitrate content was improved. The nitrogen loss was effectively controlled. The fertility of caragana powder after maturity was ensured. The physical and chemical properties of substrate after maturity meet the requirements of an ideal substrate and the substrate extract will not produce toxic effects on seed. But considering the root growth, plant protection, fixed exchange with the outside air, water holding capacity and retention capacity of substrate, nitrogen sources of 75% organic fertilizer +25% fertilizer and 50% organic fertilizer +50% fertilizer caragana powder maturity substrate are considered to be more suitable for cultivation of vegetable crops.