The red brown CHJ serial corrosion inhibitors were developed to resolve the corrosion of gas-gathering line system of high sulfur content gas well with high H2S/CO2 partial pressure and sulphur.CHJ corrosion inhibitors were composed of different amount of quaternary ammonium imidazoline,derivatives of thiazole and additives.The corrosion experiments were conducted under simulated condition of Puguang gas well.The corrosion rate was higher than 0.08 mm/a when CHJ-1 and CHJ-7 were injected respectively,while other five corrosion inhibitors could control the corrosion rate under 0.076 mm/a.The corrosion rate of CHJ-4 and CHJ-5 were 0.046 and 0.038 mm/a,and their inhibitory efficiency were of 92.6% and 93.9%,respectively.The corrosion rate were of 0.038、0.025 and 0.058 mm/a respectively when CHJ-4、CHJ-5 and foreign corrosion inhibitor were injected with separate and compound injection modes.The effect of CHJ serial corrosion inhibitors was obviously better.The microstructure analysis of test specimen and the electrochemical test results showed that the corrosion inhibitor played an important role on surface protection of the samples.In addition,the compatibility was good between corrosion inhibitors and sulphur-soluble reagent used on site.