The invention discloses a three-time reclosing method of a power distribution line. The method comprises the steps of when a fault of the power distribution line occurs, determining whether switch tripping and line power loss time in a transformer substation is in a first preset time range, if yes, when second preset time is reached after power loss, performing first reclosing by a switch in the transformer substation, and continuously determining timeliness of the fault of the power distribution line until the fault is isolated; otherwise, when fourth preset time is reached after all voltage type power distribution switches are tripped and voltage is lost in the range of the third preset time, performing first reclosing of the switch in the transformer substation; dividing the power distribution line, determining whether the fault occurs in a first interval segment, if yes, performing second reclosing of the switch in the transformer substation, isolating the fault of the line in the interval segment, and finishing; otherwise, determining whether the voltage type switch in the first interval segment is off in a Y time period, if yes, isolating the fault of the back segment of the voltage type switch, and only recovering power supplying of the first interval segment; and otherwise, performing automatic reclosing when fifth time is reached after voltage of the voltage type switch is recovered, thereby realizing the third reclosing.