Abstract: In high-temperature composting experiments, mixture of chicken manure and coconut husk wasused as basic raw material. The experiments were designed to explore effect of C/N ratio, controlled by regulating proportions of chicken manure and coconut husk in the mixture, on some physical-chemical indices of the material under composting, i.e., temperature, pH, C/N and total nutrients, in an attempt to find the most proper C/N ratio of the raw material for high-temperature composting. Results show that when the mixture was 25 in initial C/N an, reached as high as 57℃during 14 days of composting, the composts in all the treatments showed declining trends in C/N and contents of organic matter and TC; but in pH, they went up in the first 8 days and down toward the end of the composting; TN and I_G (seed germination index) increased during the process. At the end of composting, Treatments F1 (20 in initial C/N ratio), Treatment F2 (25 in initial C/N ratio) and Treatment F3 (30 in initial C/N ratio) was 11.13, 11.19 and 10.24, respectively, lower in C/N ratio; 7.94%, 8.63% and 8.29%, respectively, in content of total nutrient and 77.90%, 100.65% and 93.30%, respectively in I_G.