A gasification apparatus for atmospheric liquid fuel, primarily comprising: a fuel tank, a gasification vessel, an air pump, a low-frequency generator, and a gaseous fuel output pipe, wherein the gasification vessel further comprises a gasification plate and the low-frequency generator adds a low-frequency oscillatory wave into an air introduced into the gasification plate by the air pump so that air bubbles output by the gasification plate impact mutually and break sequentially so as to generate natural ultrasonics in a liquid fuel and thereby gasify the liquid fuel.