The invention discloses a density testing method of mineral aggregate in a recycled asphalt pavement material. The method comprises the following steps of extracting and drying the recycled asphalt pavement material by utilizing a trichloro ethylene solvent to obtain mineral aggregate; screening and grading the mineral aggregate; washing coarse aggregate and fine aggregate by utilizing an anionic surfactant aqueous solution until that all surface bubbles are discharged and no foam floats on the water surface, testing the mineral aggregate by adopting a mesh basket method after the mineral aggregate is dried to obtain the appearance relative density and the gross volume relative density; soaking filler in waterless coal oil, and testing so as to acquire the relative density of the filler; and respectively calculating the gross volume relative density and the appearance relative density of the mineral aggregate in the recycled asphalt pavement material according to a density synthesis formula 1 and a density synthesis formula 2. The method has advantages that the mineral aggregate is washed in two ways, so that the determination precision of the overall density of the mineral aggregate can be improved; the operation is carried out inn a fuming cupboard, so that the environmental pollution is small, and the body health of test personnel is not influenced; the operation is simple and easy, and data are real and reliable.