The invention discloses a cast-welding production process for a silver-plated round terminal lead acid storage battery. The process comprises the following steps: S10, performing bus-bar cast-welding; S20, welding a round terminal; S3, performing secondary slotting on a pole group. The process is characterized in that a cast-welding bottom die used in the step S10 hollows out a lug position where a round terminal column head is positioned; in the step S20, a cast-welding machine and a cast-welding clamp top column are used for limiting to enable a bus bar to be higher than a notch, then a tooling welding frame is used for positioning the battery and a column head lug, then a silver-plated round terminal is placed on the tooling welding frame, and then welding is performed by using a welding gun to enable the lug and the silver-plated round terminal to be connected together; in the step S30, a secondary slotting device is used for pressing the pole group into a battery jar for a second time, so as to implement a whole cast-welding production. Compared with the prior art, the scheme provided by the invention greatly improves the degree of automatic production, reduces manual welding, and reduces the production cost and labor intensity, the processed battery is good in consistency, the terminal is welded firmly, and the product is more durable.