EWTP-1000 Diesel and gas dual-use thermoplastic preheater is improved based on common thermoplastic(gas type). This type of equipment is apart from the common type in heating system. It use advanced oil gas dual-purpose stove(liquefied petroleum gas and diesel oil can be used as fuel) so that the good fuel efficiency and fuel economy will be fully guaranteed . Especially in strong wind area, oil type is not easy to be affected by the wind force which will ensure the high fuel efficiency and melt speed thus reducing the construction costs. It must be the first choice for the construction in large temperature difference areas.