The invention discloses 800MPa-grade cold-rolled hot-galvanizing dual-phase steel. The 800MPa-grade cold-rolled hot-galvanizing dual-phase steel comprises the following raw materials taken as chemicalcomponents in percentage by mass (%): 0.05% to 0.10% of C, 1.60% to 2.30% of Mn, 0.010 to 1.0% of Als, 0.10% to 0.60% of Si, 0.010 to 0.050% of Nb, 0.05 to 0.30% of Cr, 0.05 to 0.30% of Mo, P not smaller than 0.015%, S not greater than 0.010%, N not greater than 0.008%, and the balance of Fe and inevitable impurities, and noble metal elements Cr and Mo satisfy the relation that Cr+Mo is not smaller than 0.05 and not greater than 0.30, and C+Si/30+Mn/20 is not greater than 0.22. The production method for the hot-galvanizing steel for an automobile wheel cover comprises the steps of smelting, continuous casting, heating, hot rolling, cooling, coiling, pickling, cold rolling, annealing and coat-plating. According to the invention, the obtained cold-rolled hot-galvanizing dual-phase steel hasless precious alloying elements, so that the product has good mechanical properties, surface quality, formability and welding performances. Furthermore, the 800MPa-grade cold-rolled hot-galvanizing dual-phase steel disclosed by the invention can be produced on the existing conventional production line without additional equipments.