The invention relates to a liquid carbon five gasification device used for places providing big/small volume of combustion gas, which comprises a trolley, a pot body, a gas generating mechanism and a group of heating elements, wherein a separation plate is arranged at the lower part of the trolley, the upper part of the separation plate is provided with a heating medium cavity, and the lower partof the separation plate is provided with a gas generating mechanism cavity; the pot body is arranged on the trolley, the bottom of the pot body extends to the heating medium cavity, and a microporousplate is arranged at the lower part of the pot body along the length direction of the pot cavity; a gas chamber is formed between the microporous plate and the inner wall of the bottom of the pot cavity, a first flammable gas cavity is formed at one end of the pot body, and a second flammable gas cavity is formed at the other end of the pot body; the gas generating mechanism is arranged in the gas generating mechanism cavity and is communicated with the gas chamber; the group of heating elements are arranged in a separation way along the heating medium cavity, the heating elements are fixed to a sealing plate, and the first flammable gas cavity and the second flammable gas cavity are respectively matched with a first flammable gas leading-out interface and a second flammable gas leading-out interface. The invention has the advantages of providing convenience in installing and changing the heating elements, improving gasification effect, shortening gasification time, saving power energy, shortening gasification time in winter, saving electric energy and meeting requirements for real-time utilization.