The invention provides a hard tinned original plate with a thin specification and a manufacture method thereof, wherein the original plate comprises components of C 0.095%-0.130%, Si <= 0.020%, Mn 0.25%-0.40%, P <=0.015%, S <=0.015%, Als 0.015%-0.055%, Ti 0.005%-0.020%, N <= 0.003% and the balance being Fe. The method comprises smelting, continuous casting, hot rolling, acid pickling, cold rolling, electrolytic degreasing, full hydrogen cover annealing and flattening. The size of nonmetallic inclusions in steel after smelting is smaller than 10 [mu]m and lower than 0.04 unit/m2. Zero defect continuous casting is adopted. The heating temperature of hot rolling slabs is 1190-1250 DEG C and the heating time thereof is no shorter than 200 minutes, and the rough rolling temperature, finish rolling temperature and coiling temperature are 1030-1090 DEG C, 860-900 DEG C and 540-600 DEG C respectively. A CVC rolling mill is used in cold rolling, the total reduction rate being 86%-93%. The annealing temperature is no higher than 560 DEG C and the annealing time is no shorter than 12 hours. The flattening elongation percentage is 1.5%-2.0%. The alloy of the invention has low cost, small and few nonmetallic inclusions, excellent stamping performance, high product hardness value and small thickness.