The invention discloses a waste oil heating device through waste oil gas burning, and relates to the waste oil heating device in waste oil regeneration. The waste oil heating device through waste oilgas burning is characterized in that a coil is arranged in a tank body, the lower portion of the coil is connected with a coil oil inlet, a coil oil outlet is connected to the upper portion of the coil, a gas stove is arranged at the bottom of the tank body and is provided with a waste oil gas inlet, a heat isolation plate is horizontally arranged at the upper middle portion of the interior of thetank body, a heat preservation layer is arranged outside the tank body, and a smoke outlet is formed in the top of the tank body. The waste oil heating device through waste oil gas burning is reasonable in structure, waste oil gas is sufficiently used, waste materials are changed into things of value, burning is sufficient, the waste oil heating speed is high, the waste oil heating device throughwaste oil gas burning is safe and reliable in use, emission meets relevant regulations of environmental protection, pollution to the environment is greatly reduced, potential safety hazards are eliminated, the waste oil regeneration production cost is obviously reduced, and the promotional value is achieved.