The invention discloses a retrospective dose measurement method with high flux and stable signal intensity. The retrospective dose measurement comprises the steps of: 1, making on-site salt into a plurality of dose elements; 2, detecting the dose elements by using a pulsed photoluminescence technology, and determining detection frequency n required by the salt dose element with the highest dose onthe premise of completely exciting salt dose information; 3, detecting each dose element radiated with different doses for n times to obtain a relationship between salt OSL signals and the absorbed doses; and 4, measuring a photoluminescence signal of the salt on site, and calculating to obtain the absorbed dose of the salt according to the relationship between the salt OSL signal and the absorbed doses. Based on the photoluminescence technology, the salt is used as a retrospective dose material, the retrospective dose measurement method with high flux and stable signal intensity is provided,the radiation absorption dose of the salt on site in an emergency nuclear leakage event can be effectively measured, and the measurement method with high flux and stable signal intensity is providedfor measuring the public dose in a nuclear accident.