Flame weeding machine

The utility model discloses a flame weeding machine which comprises a fuel gas tank, a hose, a handle, a control handle, a hydraulic switch, a steel pipe, an electronic ignition switch, an air injection device, a fire maker, an air injection port and a protective cover. The air injection device is composed of an air injection port, a metal frame of a V-shaped structure and a panel connected with the metal frame, and a corresponding hole is formed in the position, right opposite to the steel pipe air injection port, of the panel. When the flame weeder is in a working state; gas switch controlled by nut, liquid compressed methane or other inflammable gas in the gas tank is introduced into the steel pipe; the handle is used for adjusting the air inflow; then the electronic ignition switch ispressed; liquid compressed methane or other inflammable gas is sprayed out from a gas spraying opening connected with the gas spraying device and enters the protective cover through opposite holes ina panel of the gas sprayin