This work aimed to study the protective effect of cold sprayed zinc on the welding structure parts and the influence of its subsequent treatment processes such as welding, coating and so on, and to solve the problem of weld corrosion which cannot be solved by conventional packaging. The effect of the three protection methods used in protective packaging for metal structure parts was studied, including PE bag packaging, VCI packaging and VCI and cold zinc sprayed protective packaging, through the natural environmental exposure test, the neutral salt spray test and other laboratory methods. After 30 days of salt spray test, the metal substrate of welding plates under the protection of PE bag packaging showed corrosion in both the substrate and the welds, and the welds showed more serious corrosion than the substrate. The metal substrate of welding plates under the protection of VCI packaging showed no obvious corrosion, but their weld and heat affected zones showed a few signs of corrosion. In contrast, the welding plates under the protection of the VCI and cold zinc sprayed protective packaging showed no obvious sign of corrosion. The results showed that the conventional protective packaging could only protect the metal substrate, but not the weld joint. The improved protective packaging method, cold sprayed zinc, had outstanding protective effects, and was easy to use. This method had less pollution, and would not affect the subsequent painting and welding or other process. Besides, the VCI packaging could provide good protection on metal substrate. So the combined type protective packaging could be an effective protection way applied to welding metal structure parts.