Novel building wall energy-saving system

The utility model discloses a novel building wall energy-saving system which comprises an insulation coating layer, an insulation putty layer, a leveling treatment layer, a self-insulation wall, an internal insulation layer and an internal wall facing layer. The outer side of the self-insulation wall is sequentially covered with the leveling treatment layer, the insulation putty layer and the insulation coating layer while the inner side of the same is sequentially covered with the internal insulation layer and the internal wall facing layer. By the arrangement, energy-saving requirements in hot-summer and cold-winter areas can be met, treatment of adhering insulation materials to the heat bridge portion is not needed, quality problems of cracking, falling off, leaking and the like of an external insulation system of an external wall are avoided, and common quality problems of hollowing, cracking and the like easy to occur to a self-insulation block wall are solved.