Harp type curtain pulling gate and gate opening and closing method

The invention discloses a harp type curtain pulling gate. The gate comprises a base and an annular rail arranged on the base, a water blocking curtain assembly connected through a sliding connecting piece and a traction piece is arranged in the annular rail, and the water blocking curtain assembly comprises a water blocking curtain and suspension connecting wires arranged at the first periphery ofthe top of the water blocking curtain at intervals. One end of the sliding connecting piece is located in the annular rail, and the other end is connected with the suspension connecting wires and thesecond periphery of the water blocking curtain; and the traction piece is connected with the sliding connecting piece and used for opening the water blocking curtain to block riverway water flow andclosing the water blocking curtain to enable the riverway water flow to circulate. The invention further discloses a curtain pulling gate opening and closing method. The water blocking curtain arranged in the annular rail serve