Granary cold wall system and method based on walkway plate and double-layer cavity covering surface

The invention relates to the field of grain storage, in particular to a granary cold wall system and method based on a walkway plate and a double-layer cavity covering face. A plurality of downward walkway plate holes are formed in the downward surface of the hollow walkway plate (1), the end part of the hollow walkway plate (1) is connected with an air supply structure, and air can be blown or exhausted from the grain surface through the hollow walkway plate (1); the main body of the double-layer heat insulation film ventilation structure (2) comprises two layers, the upper layer is an upper layer heat insulation material (202), the lower layer is a double-layer heat insulation film ventilation structure gap (204), and the double-layer heat insulation film ventilation structure gap (204) is downwards provided with a plurality of grain surface ventilation holes (23); the method comprises the following implementation modes: a direct local ventilation mode, a mode of directly adopting a hollow walkway plate (1)