Introduces a kind of compound ferrous sulfide cleaner, the principle to use the coordination reaction and oxidation and reduction reaction to the ferrous sulfide removal equipment. Respectively in different complex agent and oxidant ferrous sulfide removal, according to the result of single factor experiments, chose the sodium pyrophosphate and sodium hypochlorite as the main composition of cleaning agent, use the orthogonal experiment to investigate the concentration of sodium hypochlorite, sodium pyrophosphate mass, cleaning time and cleaning temperature effect on the clearance of ferrous sulfide. The experimental results show that when the concentration of sodium hypochlorite is 0.003 mol/L, sodium pyrophosphate mass is 1.5 g, cleaning temperature is 80 ℃ and the time is 12 h, the clearance rate of ferrous sulfide is highest, at 75.0%.