The invention discloses a reclosing loop suitable for a T connected small hydropower line. The loop comprises an outlet loop, a monitoring loop, a control power supply and a protection power supply. The outlet loop is connected between positive and negative electrodes of the control power supply. The monitoring loop is connected between positive and negative electrodes of the protection power supply. The outlet loop comprises a reclosing motion contact point CHJ, a reclosing pressing plate LP, an electrified-display-apparatus normally-closed contact point DS-1, a closing maintenance relay HBJ and a breaking-closing operating mechanism which are successively connected in series and are in a protection device. The monitoring loop comprises an electrified-display-apparatus normally-closed contact point DS-2 and an optical coupling switch of the protection device which are successively connected in series. The loop possesses advantages that on a basis of not increasing an equipment investment, automatic reclosing of the T connected small hydropower line is realized; a reclosing success rate and a correct rate are high; simultaneously a reclosing loop state is monitored in real time; and under an abnormal condition, monitoring personnel is timely prompted and power supply reliability of the T connected small hydropower line is increased.