The invention provides vertical tinning equipment for a semi-flexible coaxial cable shielding layer, which comprises a pay off machine and a wire-receiving machine for paying out and receiving wires, a tinning groove, a lower guide wheel positioned below the tinning groove and an upper guide wheel positioned above the tinning groove; and the tinning groove is arranged on a stand. The invention also provides a vertical tinning method for the semi-flexible coaxial cable shielding layer; the method is a two-step method rapid tinning process which comprises a pretreatment process and a vertical tinning process. The invention has the advantages that the vertical tinning equipment and the vertical tinning method are used to tin the semi-flexible coaxial cable shielding layer, shorten the residence time of a cable in the tinning groove and the immerging length in tin liquid, effectively solve the problems of air vents existing in the coaxial cable tinning process and insufficient adhesive force of a tin layer to a shielding net and improve the tinning quality; and simultaneously, a high tinning speed and the two-step method tinning process are adopted, so the production efficiency is improved and the waste of material head and tail of the cable are reduced.