The invention discloses a hot-dip galvanized steel plate and a production method thereof and relates to the technical field of production of hot-dip galvanized steel plates for automobiles. The production method of the hot-dip galvanized steel plate comprises the steps as follows: a plate blank is sequentially subjected to technological processing including hot rolling, coiling, cold rolling, cleaning, annealing, galvanization, finishing and drawing-straightening, wherein hot rolling includes rough rolling and finish rolling, and an intermediate plate blank obtained after finish rolling is cooled to 790-820 DEG C at the cooling rate of 75-90 DEG C/s, then cooled to 770-800 DEG C at the cooling rate of 20-30 DEG C/s and coiled; the reduction rate in cold rolling is 78%-83%; a continuous annealing manner is adopted in annealing, the annealing soaking temperature is 860-885 DEG C, and the soaking time is 40-70 s; the galvanization temperature of a zinc pot which a base plate enters is 450-470 DEG C. According to the hot-dip galvanized steel plate and the production method thereof, through accurate control on temperature technological systems of all sections of hot rolling, cold rolling and continuous annealing, the key technology for producing the hot-dip galvanized steel plate with the low yield strength on a continuous hot-dip galvanizing unit is formed.