Street lamp with air purification function

The invention discloses a street lamp with an air purification function. The street lamp with the air purification function comprises a street lamp body and air purification equipment which is detachably connected to the street lamp body; the air purification equipment comprises an equipment shell, an energy supply module, an air suction module, a biological nano-membrane module, a waste collection module, a control module and a clamping piece; and the biological nano-membrane module comprises a biological nano-membrane generation sub-module and a biological nano-membrane replacement sub-module. The equipment shell is of a cylindrical structure, the top is provided with the biological nano-membrane generation sub-module, and the bottom is provided with the waste collection module; and the energy supply module is arranged at the upper end of the biological nano-membrane generation sub-module. The street lamp performs haze treatment based on the biological nano-membrane, has the characteristics of independent e