We could reach a conclusion that we couldn't say coal direct liquefaction was better than indirect liquefaction only according to the techinque by analyzing the comparing between the technology principle of coal liquefaction and coal liquefaction technique.Both of them have their own advantages.It has a certain conclusion that they can replenish each other.Our country has a vast territory and there are all kinds of coal.Both of two liquefaction techniques have a vast range of prospects for using.