Abstract: To maximize the consumptive ability of the distribution network to the distributed generations，an approach of improving the allowed penetration level by utilizing the distribution network reconfiguration under the condition of considering line loss is proposed. Models for calculating of distributed generation is introduced. And the mathematical model of distribution network reconfiguration with is set up，in which，the sum of the reduction of the network loss and the admittance capacity of distributed generations after the distribution network reconfiguration is introduced as the index. Superior optimization algorithm is introduced to find out the best planning scheme of distribution network reconfiguration and the allowed penetration capacity of every distributed generation. Through the calculation of the IEEE33 node，the results show that the approach always have good effects to improve the allowed penetration capacity. When the load is greatly reduced, the allowed penetration capacity of every distributed generation are compared before and after distribution network reconfiguration. And the results of which show that it is still feasible and effective to improve the allowed penetration capacity.