The effect of different concentrations of sulfuric acid on the composting process and nitrogen loss of sheep manure was studied. Using sheep dung and wheat straw as compost materials，with 1，2 and 3 mol/L sulfuric acid as additives，a 50 d test was carried out by using bar-stack composting to monitor the temperature，pH，EC，seed germination index，C/N and nitrogen loss rate during the composting process. The results showed that the time required for the temperature of the pile treated with sulfuric acid to rise above 50℃ was shorter than that of the CK treatment without sulfuric acid by 4～6 d，and the high temperature holding time of the pile increased with the increase of the concentration of sulfuric acid. EC and seed germination index increased with the increase of sulfuric acid concentration. The seed germination index ..of 2 and 3 mol/L treatments were 83.0% and 84.2%，respectively. The total nitrogen content of the compost product increased by 16.32% and 13.16%，respectively，compared with CK treatment. When the sulfuric acid concentration was 2 mol/L，the total nitrogen loss rate was the lowest with 24.03%，and the nitrogen retention effect was the best. In the process of composting sheep manure strips，adding 2 mol/L sulfuric acid 2 L/m3 at 0，10 and 20 d，not only accelerated the compost maturity process，but also increased the total nitrogen content of the compost product，and the nitrogen preservation effect was remarkable. This study provides a theoretical basis for the application of sulfuric acid additives in the composting of livestock and poultry manure to produce high-quality organic fertilizer.