The existed evaluation of energy efficiency of ethylene equipments does not consider the different raw materials

process technology and equipment sizes

and ignores the relative factors of energy efficiency index

so it cannot analyse the saving energy choice among energy consumption factors.The paper puts forward the energy efficiency analysis method for ethylene equipments according to technologies

scales and data distribution of energy consumption including fuel

power

steam and water inner ethylene process boundary.Furthermore

energy efficiency virtual benchmarking method is proposed based on dependent function analytic hierarchy process model (DFAHP)

with which it can manipulate multi-factors and energy efficiency index together.It outweighs the traditional evaluation method such as the mean method and optimal index method.The applications of an ethylene equipment

even the whole ethylene industry for energy efficiency analysis are tested.The validity of proposed method is verified

which is more helpful to find the saving energy chance and quantified energy targets.