Stable supporting structure for mobile house

The utility model relates to the technical field of mobile houses, in particular to a stable supporting structure of a mobile house, which comprises a lower supporting column, an upper supporting column, a fixing plate and a folding column, a first folding rod and a second folding rod on the folding column are folded rightwards, and a convex plate on the second folding rod rotates along an interval groove on the first folding rod after the folding is finished. A second bent buckle part on the second folding rod is separated from a first bent buckle part on the first folding rod, then the first folding rod and the second folding rod of each folding column are folded in half, then the fixing plates between the front lower supporting column and the rear lower supporting column are disassembled, the front-back spaced fixing plates of the upper supporting column are disassembled, and the folding columns are small in occupied space after being folded. And the problems that the longitudinal length of a supporting pl