Abstract: With the advancement of "ubiquitous power internet of things",the coupling relationship of various energy flows in the CCHP system is more complicated,the CCHP liaison office is prone to fluctuations,and the permeability of renewable energy in the system is crucial to the safety,stability and economic operation of the system. On the basis of the traditional power connection line,the connection line is divided into connection line 1（cold）,connection line 2（heat）and connection line 3（electricity）according to the type of energy transmission,and the power fluctuation cost of the connection line is taken into account to establish a RE-CCHP model containing renewable energy. Aiming at the RE-CCHP model with multi-target,high latitude,nonlinearity and strong coupling,this paper proposes an improved multi-target moth-to-fire algorithm（MOMFO）,Through simulation,the capacity configuration of each unit in the system under different permeability of renewable energy is obtained.