Flame weeding machine capable of detecting weed density and crops

The invention discloses a flame weeding machine capable of detecting weed density and crops. The flame weeding machine comprises a moving platform, a weed density and crop recognition device, a leaf gathering mechanism, a fire damper mechanism and a fire spraying device. Weed density information and crop size information on a walking path are recognized through a weed density and crop recognition device, the flame intensity is adjusted through a flaming system according to the recognized weed density, and fuel gas is reasonably utilized; and the leaf gathering mechanism and the fireproof plate mechanism adjust the fireproof protection space for the crops according to the identified size information of the crops, so that a good fireproof protection effect is achieved, and meanwhile, the flame weeding area for the crops can be increased. In addition, a lifting mechanism is further designed and used for controlling the weed density and the overall ground clearance of the crop recognition device, the leaf gatheri