Composite complexing agent and chemical nickel-plating solution containing same

The invention discloses a composite complexing agent and a chemical nickel-plating solution containing the same. In the invention, the composite complexing agent comprises the following components: 5-100g of adipic acid, 3-15g of tartaric acid, 4-15g of one or two of malic acid and citric acid and 5-6g of succinic acid or propionic acid. The invention solves the problem of short circulation cycleof a plating solution in the prior art, and meanwhile, the chemical nickel-plating solution does not contain 18 pollutants, such as lead, cadmium and the like to which high global attention is paid, therefore, the invention has the advantages that the work temperature is lower, the hardness is high and the corrosion-resistance performance is high, and the requirement on cleaning production is met.