Modularized energy-saving building

The utility model discloses a modularly-built energy-saving building, and relates to the technical field of building assembly. The modularized energy-saving building comprises a base, the top of the base is fixedly connected with a house body, the house body is composed of a plurality of wall bodies, the outer wall of one side of the house body is fixedly connected with an opening door through hinges, the top of the house body is fixedly connected with supporting columns, the tops of the supporting columns are fixedly connected with a rainproof roof, the rainproof roof is of a slope-shaped structure, and water guiding grooves are formed in the two sides of the top of the rainproof roof. Through the arrangement of the wall bodies, the building is more convenient to assemble through the male tenon structures and the female tenon structures among the multiple wall bodies, assembly can be achieved without too many bolts and other parts, the problems that an existing assembly type building is large in part number