Green pouring method of small component for building construction

The invention discloses an environment-friendly pouring method of a small component for building construction, and relates to the technical field of building construction, and the environment-friendly pouring method comprises the following steps: step 1, erecting a formwork in a pouring area of the small component; secondly, a waterproof area and a non-waterproof area are obtained through a plurality of formwork supporting plates in pouring equipment; 3, pouring a waterproof material in the waterproof area by adopting pouring equipment, and obtaining a first concrete block by adopting conventional concrete; fourthly, the partition plate supporting formwork is taken out, micro-expansion fine aggregate concrete is poured into the pouring area, and a second concrete block is obtained after solidification and drying; and fifthly, the formwork for formwork erecting is taken down. Small components are divided into the first concrete block, the waterproof block and the second concrete block, the specific position ca