Abstract: Taking the integrated equipment of rural domestic sewage treatment in a certain area of Yunnan as an example,the application of bio-rotary combination process equipment and A²/O combined process equipment in an actual project was analyzed. The average removal rates of COD_Cr,NH₄⁺-N,TP and TN in the bio-rotary combination process equipment were 70. 32%,49. 00%,27. 82% and 38. 66%,respectively. The average removal rates of them in A²/O combined process equipment were 81. 24%,68. 08%,37. 30% and 51. 29%,respectively.The results showed that the removal rate of each index of A²/O combination process equipment was better than that of bio-rotary combination process equipment. The A²/O combination process was more suitable for use in integrated domestic sewage treatment equipment. The integrated equipment was not ideal in the removal rate of TN and TP,and needed to be continuously optimized and perfected.