The invention provides a chemical flooding new added recoverable reserves dynamic calibration method comprising the following steps: in a first step, remaining technologically recoverable reserves for water flooding base oil are measured and calculated; in a second step, a solution coincidence rate is measured and calculated based on added oil designed in a solution and actual added oil N years after polymer injection becomes effective; in a third step, added oil per ton of injected polymer is measured and calculated according to the solution coincidence rate; in a fourth step, new added recoverable reserves for an Nth year are measured and calculated; in a fifth step, when an effective year of N is greater than 1, an added recoverable reserve correction value of a year of N-1 is measured and calculated; in a sixth step, total chemical flooding new added recoverable reserves of the Nth year are determined; via the chemical flooding new added recoverable reserves dynamic calibration method, intrinsic errors of original digital-analog methods on recoverable calibration can be corrected; accuracy and rationality of recoverable reserve evaluation results of a chemical flooding unit can be improved; an accurate, simple and feasible method is provided for evaluation of oil adding effects of the chemical flooding unit.