Ground deflagration type ignition device

A ground deflagration type ignition device comprises a fuel gas pipeline, an air pipeline and an ignition part, wherein a Y-type filter, a flow regulating valve, a flow meter, a pressure reducing valve, a switching valve and a pressure gauge which are connected in series are sequentially arranged on each of the fuel gas pipeline and the air pipeline, wherein outlet ends of the fuel gas pipeline and the air pipeline are communicated with an inlet end of a combustion chamber respectively; an outlet end of the combustion chamber is communicated with a deflagration pipe; and the ignition part comprises a high-energy generator arranged in an anti-explosion box and an ignition rod, and a protection casing pipe is arranged outside the ignition rod. The ground deflagration type ignition device has the benefits as follows: a mixing ratio of fuel gas and air introduced into the combustion chamber can be effectively regulated, so that the mixing ratio of a gas mixture reaches the upper limit of the deflagration range, a