The invention discloses a production method of a 440MPa-grade thin gauge hot-rolling pickling automobile sheet. The hot-rolling pickling automobile sheet is prepared from the chemical element components in percentage by weight: C is 0.07-0.09, Si is less than or equal to 0.05, Mn is 1.00-1.20, P is less than or equal to 0.020, S is less than or equal to 0.020, Nb is 0.010-0.020, Als is 0.030-0.050, Ti is 0.010-0.030, N is less than or equal to 0.008, and the balances are Fe and unavoidable impurities. The preparation method sequentially includes the following steps of liquid iron pre-desulfuration processing, converter steel-making, steel ladle LF refining, continuous casting, casting blank heating, rough rolling, finish rolling, laminar flow cooling, high temperature coiling, skin rolling, pickling, rinsing, oil coating and coiling. According to the production method, the measures of low temperature heating, the rough rolling, high pressure dephosphorization before the finish rolling,dephosphorization before the rough rolling and between the finish rolling passes, and corrosion inhibitor adding in the pickling are adopted, and the surface quality of a steel coil is improved; andthe reduction rate of the finish rolling, the finishing rolling temperature, coiling temperature precision control and high temperature coiling are adopted, stability of a steel coil general rolling technology is ensured, and the strip shape quality and the performance general volume stability of the steel coil are improved.