Heat insulation roof component with ventilation and heat dissipation functions

The utility model discloses a heat insulation roof member with ventilation and heat dissipation functions, which comprises a roof unit and a support unit, the roof unit comprises a roof panel, the support unit comprises an unpowered hood and a sleeve, the roof panel comprises a bottom plate and a surface layer plate which are arranged at an interval, and the surface layer plate is arranged above the bottom plate. A heat preservation cavity is formed between the surface layer plate and the bottom plate and filled with heat preservation materials, an exhaust pipe and an air supply pipe are arranged in the heat preservation cavity, the air supply pipe is communicated with the indoor space and the heat preservation cavity, the sleeve is divided into an upper sleeve and a lower sleeve, the upper sleeve and the lower sleeve are communicated through an exhaust hole, and the exhaust pipe is communicated with the lower sleeve. The top unpowered air cap is driven by natural wind power to enable air in the inner cavity