Method for promoting transformation of propane for preparing aromatic hydrocarbon

The invention discloses a method for promoting transformation of propane for preparing aromatic hydrocarbon. Through a method for adding an accelerant into raw materials, the transformation ratio and reaction speed of propane is increased. The accelerant is any one or a mixture of methanol, dimethyl ether, ethanol, methyl chloride, methyl iodide, methylbenzene and dimethyl benzene; in a mixed material of propane and the accelerant, the carbon atom ratio of the propane to the accelerate is 10-500; and a molecular sieve catalyst is any one or a mixture of HZSM-5, HZSM-11, HZSM-22, HZSM-23, HY and HBeta.