The invention relates to a low-
toxicity mannich base compound for preparing an acidizing
corrosion inhibitor. A molecular formula of the compound is shown in the specification. The invention also relates to a mannich acidizing
corrosion inhibitor prepared by using the
mannich base compound, and further relates to a mannich synergistic acidification
corrosion inhibitor formed by the mannich acidizing
corrosion inhibitor and a
halide ion synergist in a compounding manner. In addition, the invention relates to a preparation method of the mannich acidizing
corrosion inhibitor. A formula of the mannich acidizing
corrosion inhibitor is prepared from a main mannich acidizing corrosion inhibitor, an
organic solvent, a surfactant, a corrosion additive and a
solvent in the compounding manner. The invention further relates to a method for preparing the mannich synergistic acidification corrosion inhibitor by using the method. By adopting the
mannich base compound, the acidizing corrosion inhibitor and the preparation method thereof, the problems that the corrosion inhibitor product in the prior art is serious in
pollution, high in cost, and unstable in performance are solved.