Deep litter system,as an agricultural rearing technique,can reduce animal manure egesta and pollution and the selection and management of raw materials for litter were of great importance.In this trail,different abandon litters’ physical and chemical properties of deep litter system were measured in order to obtain an answer whether they could be used in field or not.The results showed that the abandon litters were rich in organic matter,nitrogen,phosphorus and potassium.The contents of organic matter,total nitrogen,total phosphorus (P2O5) and total potassium(K2O) were in the range of 43.19%~53.95%,2.28%~2.66%,2.36%~2.70% and 2.80%~3.62% respectively.They were all lower than the respective values in the organic fertilizer national standards (NY 525—2012).But these litters had high pH and EC (the pH value were 8.03~8.93 and EC were 3 679~4 310 μS/cm) which could bring risk on soil alkalinization and soil salinization in the north of China.The amounts of Ecoli were in the range of 48.00×104~52.00×104 cfu/g which were higher than control standards of urban wastes for agricultural use (GB 8172—1987).And Salmonella could be detected in these litters which the amount were 18.33×102~38.33×102 cfu/g.The contents of GI were in the range of 15.88%~31.52% which was too low.The abandon litters have the fundamental properties of organic fertilizer,and must be harmlessly processed before land utilization for biological safety risks.