Constant temperature and humidity device for crop incubator

The utility model discloses a constant temperature and humidity device for a crop incubator. The constant temperature and humidity device comprises a water storage tank, a temperature and humidity control box, a heating and humidifying component, an axial flow fan, a gas conveying and distributing pipeline and a gas outlet grating, the heating and humidifying part is arranged at the top of the water storage tank and communicated with the water tank; the upper end of the heating and humidifying component is connected with the lower end of the axial flow fan, the upper end of the axial flow fan is communicated with the top of the incubator through a gas conveying and distributing pipeline, and gas outlet grids are arranged on the lower portions of the two sides of the incubator; a temperature and humidity transmitter is arranged in the incubator, a temperature and humidity control instrument is arranged in the temperature and humidity control box, and the temperature and humidity transmitter and the heating and