Phase balancing and power losses are two significant problems in distribution networks. REPHASING technique is one solution for phase unbalancing. Reconfiguration is also used for power loss reduction and voltage profile improvement. While reconfiguration does not have a great effect on power loss reduction, in this paper a new method for simultaneous optimization of REPHASING and reconfiguration problems in distribution networks are introduced to reduce phase unbalancing and power losses and improve the voltage profile. The greatest advantage of simultaneous optimization of REPHASING and reconfiguration is a very low performing cost. Besides, optimal DG placement can reduce the power loss and improve voltage profile. As there are several objective functions, the objectives are fuzzified and integrated as the fuzzy multi-objective function. Eventually, by using the BF-SD algorithm, optimization of REPHASING, reconfiguration and DG placement are simultaneously performed. At the end, the proposed method is applied to feeder No.3062 in Ahwaz, Iran.