The utility model belongs to the technical field of the boiler technique and specifically relates to a mix formula gas sprayer and boiler in advance is related to to alleviate among the gas boiler's among the prior art the combustion processes because the gas mixes the not high technical problem of the inhomogeneous combustion efficiency who leads to. Include: first casing and second casing, run through first casing and the part stretches into the gas pipeline of second casing inner chamber, first casing one side is provided with air inlet, and the terminal surface that first casing is relative with the second casing is provided with air duct, and one side that the second casing deviates from first casing is provided with a plurality of gas burners, the air gets into the inner chamber of first casing by air inlet, gets into second casing inner chamber through air duct, and the gas gets into second casing inner chamber through the gas pipeline, lighted and spout by the nozzle behind second casing inner chamber and air mixing, therefore the gas in the mist and air can the misce bene, carries to burn more fully to the mist of nozzle, has improved combustion efficiency.