The invention provides a method for resource recovery of construction wastes, which comprises the following steps of: separating and removing impurities from the construction waste materials and preparing aggregates from the materials through the disposal processes of manual separation, crushing, magnetic separation, air separation, screen separation and the like, wherein the particle sizes of the aggregate meet the requirement of milling equipment, and then preparing regenerated powder from the regenerated fine aggregates with various particle sizes through the disposal processes of drying, grinding, air separation and the like. According to the method, the resource utilization value of the construction wastes is improved, and simultaneously, a resource utilization channel of the construction wastes is opened up; and the produced regenerated powder of the construction wastes can partially substitute fly ash to serve as a cement-base construction raw material such as a building mortar, a walling material, a low-end concrete and the like.