The invention discloses a hard tin-plated substrate for a bottle cap and a production method thereof. The substrate comprises, by weight percentage, 0.06-0.10% of carbon, 0.30-0.60% of manganese, 0.02-0.08% of aluminum, less than 0.03% of silicon, less than 0.005% of nitrogen, less than 0.02% of sulfur, less than 0.02% of phosphorus, and the balance ferrum and other inevitable impurities. The production method comprises the following steps of smelting, refining, continuous casting, hot rolling, acid pickling, one-time cold rolling, annealing, secondary cold rolling and finishing. According tothe hard tin-plated substrate and the production method, the appropriate components are designed, the process of annealing and secondary cold rolling is designed, so that the secondary cold-rolled tin-plated substrate which has relatively high hardness and relatively good elongation is produced; and the hard tin-plated substrate is low in production control difficulty, low in cost, stable in performance and suitable for producing a crown cover, a rotary opening cover and the like.