The invention discloses a ferrite-based tempering steel plate of which the yield strength is 900Mpa and a production method. The ferrite-based tempering steel plate not only is prepared from chemicalcomponents of C, Si, Mn, P, S, Ti, Mo, Nb, Alt, Ca and N, but also an appropriate amount of Cr is added, and the balance is Fe. Steel ladle+vacuum dual refining smelting and pouring are adopted, a continuous casting billet is subjected to hot charging and hot conveying, the charging temperature of the continuous casting billet in a heating furnace is greater than 400 DEG C, the heating temperaturein the heating furnace is 1230 to 1280 DEG C, the hot rolling finish rolling temperature is 820 to 900 DEG C, a quick-cooling rate which is greater than 25 DEGC/s is adopted for cooling after rolling, the rolling temperature is 560 to 640 DEG C, a steel coil is cut and flattened along a transverse cutting line, and the cut and flattened steel plate is subjected to tempering at (500 to 650 DEG C)/(15 to 50 minutes) in a wide flat steel heat treatment line. The production method of hot continuous rolling, steel coil flattening and opening and steel plate tempering is adopted, a microscopic structure of steel is used as a ferrite matrix, strengthening mechanism is based on precipitation strengthening and refined crystalline strengthening, and the ferrite-based tempering steel plate is low-carbon steel, has good welding and extending plasticity and forming performance, and is suitable for being used on engineering machinery vehicles or automobile vehicles.