A gasification stove includes an upper housing including an upper hollow body and a dome section, and a lower housing including a lower hollow body that form a stove chamber when connected to each other. A separator for collecting a gas and flame generated from burning of the biomass is arranged in the stove chamber and includes a bowl section and a chimney section. The bowl section has a first set of holes, and an upper part of the chimney section has a second set of holes. The upper part of the chimney section is air-tightly attached to an edge of a chimney opening of the upper housing. At least some of the gas flows through the first set of holes and the second set of holes to enter into the chimney section so as to react with the flame or hot air in the chimney section to generate additional flame power.