The invention provides a zero-smoke combustion technology for soft coal brown coal biomass fuel polyolefin and other waste plastic. According to the technology, a mixed low-carbon number alcohol gel paste-shaped or pancake-shaped ignition agent, solid fuel such as soft coal, biomass fuel, brown fuel, waste polyolefin and non-toxic auxiliary materials are elaborately manufactured into columnar ignition coal and lower coal which are provided with honeycomb-shaped ventilation holes; a to-be-burnt coal pile is longitudinally combined in a furnace core, a small section of burnt paper strip ignitesan ignition cake from an upper part to generate long-flame combustion, then ignition coal is ignited, and a high-temperature area is formed in a simple combustion chamber formed by a fire gathering plate covering the top space; and radiant heat plus conduction heat is larger than convection heat, so that a red hot coal layer on the surface layer of the ignition coal is quickly moved downwards until the lower coal is ignited. The technology has the advantages that the three components of the coal pile are elaborately prepared; a stove is matched with the coal pile; ordered, long-flame and fullcombustion is generated from the upper high-temperature area to a lower low-temperature area, and zero-smoke combustion is realized in the whole process from the moment of ignition; the sulfur fixation rate is high, the heating efficiency is high, and the cost is low; and the technology is suitable for heating, cooking, water boiling, brick burning and iron casting furnace heating of small and partial medium enterprises and rural scattered households.