The invention belongs to the technical field of garbage treatment, and specifically discloses a retreatment process for domestic garbage. The retreatment process for the domestic garbage comprises thefollowing steps: firstly, placing the domestic garbage into a sorting device and sorting, and sorting out plastic and sludge in the domestic garbage; secondly, sequentially washing and airing the plastic, and then pouring the plastic into a granulator and granulating to obtain granular substances; thirdly, pouring the granular substances and common silicate concrete into a mixing device simultaneously and mixing to obtain a mixture, wherein the volume mixing ratio of the granular substances to the common silicate concrete is 6: 4; and finally, pouring the obtained mixture into a brick die, and meanwhile, carrying out air blowing on the brick die through an air blower, and rapidly air-drying the brick die to obtain a building brick for a non-bearing occasion. According to the retreatment process for the domestic garbage, other chemical raw materials are not needed as adhesives; and the process is simple, low in cost, and beneficial to environment protection.