The invention relates to the technical field of investment precision casting technology of an aluminum alloy, and discloses an investment precision casting technology of aluminum alloy doors and windows. The investment precision casting technology has the advantages that the mold filling and solidification processes of castings are controlled through selection of parameters of the investment casting technology, the pouring speed is increased, an alloy liquid better fills a mold shell, the temperature of all parts of the castings is uniform, metal oxidization is reduced, the castings are solidified at the same time, defects like splashing and pores are avoided, shrinkage compensation is facilitated, and shrinkage porosity and shrinkage cavity defects of the castings are avoided; and factorswhich have a decisive effect on quality of the castings are controlled, surface roughness of the prepared castings of the aluminum alloy doors and windows is low, size is accurate, production efficiency is relatively high, and various casting defects like shrinkage cavities and shrinkage porosities are avoided.