The invention discloses a pickling hydrogen sulfide absorbent and a using method thereof. The pickling hydrogen sulfide absorbent comprises ammonium chloride, urotropine, hydroxyalkyl triazine, peroxide and a complexing agent according to a mass ratio of 37:37:18:1:7. The absorbent is used to absorb the hydrogen sulfide gas, generated after dissolving inorganic scales containing sulfides, througha reaction in the shaft or pipeline pickling process to prevent the hydrogen sulfide gas from overflowing and dispersing and solve the hydrogen sulfide damage problem in the pickling working process.