A light super-fluidity padding mortar used indoor and outdoor is formed by mixing 28 to 32 parts by weightof R325 type or better ordinary Portland cement, 5 to 10 parts by weightof CA-50 type aluminate cement, 4 to 5 parts by weightof gypsum having a fineness more than 75 meshes, 8 to 12 parts by weightof light aggregate, 40 to 50 parts by weightof heavy aggregate (river sand), and 1.0 part by weight of compound auxiliary agent, wherein the light aggregate is an inorganic vitrified hollow pore material which has a fineness less than 100 meshes, and the compound auxiliary agent is formed by mixing 0.5 part by weightof air entraining agent, 0.3 part by weightof cellulose ether, 0.1 part by weightof re-scattering latex powder and 0.1 part by weightof water reducer. The padding mortar is diluted by adding 30 to 50 percent by weight of water and then the mixture is mixed uniformly by mechanically or manually stirring so as to reach a viscosity fit for mechanically coating or manually constructing in order to coat mechanically or construct manually. The mortar uses the specific light aggregate so the mortar has the advantages of light weight, good fluidity, excellent pasting property, difficulty to form empty drum, low heat conducting factor, energy saving, low manufacturing cost for unit area, wide indoor and outdoor application and great popularizing value.