Water-phase antirusting cleaning agent

The invention discloses phosphorus-free water-phase antirusting cleaning agent replacing a phosphating process before coating of steel. The phosphorus-free water-phase antirusting cleaning agent contains the following components in parts by weight: totally 10 to 40 parts of ethylenediamine linear homologue and molybdic acid, 4 to 20 parts of amides compound, 18 to 30 parts of alkali source, 15 to 25 parts of phosphorus-free non-ionic surfactant and the balance of water. The time of CuSO4-resistant solution pitting corrosion can reach 9-20 minutes, the time of CuSO4 solution pitting corrosion can reach 9-20 minutes, so that the phenomenon that CuSO4-tolerant pitting corrosion of the conventional phosphating film only can meet the standard of 1 to 5 minutes; the coating adhesion force of the coated surface is equivalent to that of the traditional phosphating film. The antirusting cleaning agent completely has no phosphorus, is environment-friendly, and can completely replace the traditional a phosphating solution.