The invention discloses a tinning method. The tinning method includes the following steps that firstly, deoxidation processing is conducted on an electronic element needing tinning; secondly, tinning processing is conducted, wherein the electronic element processed in the first step is sequentially immersed in soldering flux and a tin pot to be subjected to tinning; and thirdly, cooling processing is conducted, wherein the electronic element subjected to tinning in the second step is cooled and washed, and a finished product is obtained. The tinning method has the beneficial effects that an oxidation layer is preprocessed, then, tinning is conducted in an immersing and dipping manner, bad factors causing the low product percent of pass are removed, the impurity content in the finished product is decreased to be smaller than or equal to 1%, and the finished product percent of pass is increased; and meanwhile, by means of the tinning processing manner, time is shortened, it is ensured that other performance of products is not influenced, and the method is simple, convenient, easy to implement and suitable for large-scale popularization.