A novel fault locating method for transmission network using synchronized voltage phasor is presented. Based on symmetrical component method and linear superposition principle， the additional positive sequence network after fault is established and the matching index on fault point is defined. Then the fault can be located by traversing searching method with this index. Because only synchronized voltage phasor is used， the fault locating accuracy of this method is not affected by saturation of current transformer， and only sparse PMUs（phasor measurements unit） are needed. Simulations carried out with PSCAD have shown that the proposed technique can locate short-fault point on any type of transmission network accurately and adaptively， with no influence from factors such as fault resistance， fault type and so on.