Topological interlocking type roof ventilation and greening thermal insulation layer

The invention discloses a topological interlocking type roof ventilation and greening heat insulation layer which comprises basic unit modules, peripheries of the multiple basic unit modules are interlocked and spliced to form a topological relation to form a spliced roof, a ventilation layer is arranged between the basic unit modules and a building roof, two opposite edges of the spliced roof are provided with edge unit modules, and the edge unit modules are connected with the spliced roof. Ventilation gaps are formed between the other two opposite edge portions and the parapet wall, and ventilation openings are formed in the top faces of the edge unit modules. Planting grooves are formed in the upper portions of the basic unit modules, stilts are arranged on the lower portions of the basic unit modules, the multiple planting grooves are formed in the roof after interlocking and splicing, and a ventilation layer is formed below the roof. Roof ventilation and heat insulation layer modules and roof greening ar