The invention discloses a construction method of an integrally-poured building house. The method comprises the following steps of S1, drawing design, wherein according to the terrain and size data ofa construction location, a building construction drawing is designed; S2, impurity cleaning, wherein remaining building waste on the construction location is cleaned, and plant root stocks are dug andcleaned; S3, foundation exploration, wherein the construction location is subjected to terrain detection, and it is determined that no holes are formed in the construction location; S4, preparation before construction, wherein the construction ground is leveled, and then is flattened and compacted; and S5, foundation building, wherein according to the building construction drawing, the foundationposition and size information are determined, and are marked on the corresponding position, then, a constructor carries out digging work on the ground according to the corresponding size information.The method is reasonable in design, a building formwork can be conveniently constructed on a foundation and a wall supporting beam part, and is good in seal and high in stability and facilitates concrete injection, a house frame part can be integrally poured, the frame is more steady, and the house anti-vibration capacity is improved.