Cyanide-free zinc dipping solution and cyanide-free electroplating method of filter aluminium alloy by using the same

The invention discloses a cyanide-free zinc dipping solution and a cyanide-free electroplating method of filter aluminium alloy by using the cyanide-free zinc dipping solution. The cyanide-free zinc dipping solution, measured as per liter of cyanide-free zinc dipping solution, comprises 450-600 ml of plating bath solution and 400-550 ml of water, wherein the plating bath solution comprises 20-40 g/L zinc ions, 2-10 g/L nickel ions, 0.001-0.400 g/L copper ions, 0.05-1.00 g/L iron ions, 1-4 g/L cobalt ions, 80-200 g/L alkali metal hydroxide, 50-100 g/L main complexing agent, 13-40 g/L auxiliary complexing agent, and 0.07-2.00 g/L crystallization refiner. Zinc dipping and electroplating on materials with high silica content can be carried out by using the cyanide-free zinc dipping solution by just conducting zinc dipping once, the operation is simple, and the control is easy.