The work aims to control severe corrosion of down-hole strings effectively, and promote extensive use of corrosion inhibitor technology in Tahe oilfield. Major constituent of 4 organic corrosion inhibitors was verified in the method of infrared spectroscopy. Physical and chemical properties of the 4 inhibitors were also tested. Corrosion inhibition efficiency of the 4 inhibitors in injection-production alternant environment was evaluated in weight loss method. Compound property of the inhibitors was studied in electrochemical method. Effective constituent of the 4 inhibitors was oleamide, aromatic ketones mannich base, oleic imidaziline and benzyl quinoline salt, respectively. Physical and chemical properties of all were qualified. The aromatic ketones mannich base and oleic imidaziline exhibited good corrosion inhibition performance in down-hole injection-production alternant environment, and inhibition efficiency was 73% and 67%, respectively. Compounding of the aromatic ketones mannich base and oleic imidaziline could further improve corrosion inhibition efficiency. The corrosion inhibition efficiency of the compound corrosion inhibitor was up to 90% at a mass ratio 1:3 of the two inhibitors. The aromatic ketones mannich base-oleic imidaziline compounded corrosion inhibitor is an excellent corrosion inhibitor for injection-production alternant working environment in Tahe Oilfield.