The invention discloses an enclosed transportation method of powder materials capable of absorbing moisture easily. The enclosed transportation method of powder materials capable of absorbing moisture easily comprises the following steps of feeding materials in a material bin, weighing, absorbing materials at vacuum negative pressure, matching liquids and the like. The enclosed transportation method of the powder materials capable of absorbing moisture easily is characterized by also comprising a circulating feeding technology, wherein the circulating feeding technology comprises the steps of extracting powder materials at the bottom of a material bin periodically, scattering the powder materials from the top of the material bin into the material bin, so that the powder materials in the material bin form a motion cycle state. According to the invention, in order to prevent materials which easily absorb moisture from caking, a compressed air blowing method with poor effects in the prior art is abandoned, a technology of cycle feeding by combining with hot air blowing is adopted, and by adopting the method provided by the invention, the problem that the normal powder material conveying is influenced by caking due to moisture absorption is solved fundamentally; and smooth conveying of moisture absorption powder materials and efficient production are ensured, and meanwhile, defect of powder material pollution caused by treating caked powder materials is solved.