Abstract: It is known that in general any metallic material subjected to machining or surface treatment needs to be cleared of any surface oxide substance and dirt. Discussed are the problems as caused by the currently-used pickling process to remove the oxide layer of steel material resulting from quench treatment. And also introduced is the formulation of a better orthogonally-built pickling solution. Relevant practice shows that the said built solution is in possession of such advantages as better rust-removing effect, satisfactory rust-resistance and higher cost-effectiveness.