Split type roof greening heat insulation layer

The invention discloses a split type roof greening heat insulation layer which comprises basic unit modules, the peripheries of the multiple basic unit modules are interlocked and spliced to form a topological relation to form a split type roof, generally, the peripheries of 3-6 basic unit modules are interlocked and spliced to form a combined unit, the upper surface of each combined unit is spliced to form a planting groove, and the upper surface of each planting groove is spliced to form a planting groove. And side unit modules and ventilation side unit modules are arranged on the side parts of the split type roof, and corner unit modules are arranged on the corner parts of the split type roof. A plurality of planting grooves are formed in the spliced roof, a ventilation layer is formed below the spliced roof, the drainage holes are communicated with the ventilation layer, and ventilation openings are formed in the outer sides of the ventilation side unit modules. Roof ventilation and heat insulation layer