A flexible wall supported wiper hydraulic swing windscreen wiper comprises a wiper motor, a wiper driving mechanism and a wiper and is characterized in that two gear rack swing oil cylinders are communicated through a hydraulic oil pipe and transfer torque, and a forward and reverse rotating gear intermittent drive mechanism is arranged on the driving gear rack swing oil cylinder. The flexible wall supported wiper hydraulic swing windscreen wiper has the advantages that the wiper driving mechanism of the windscreen wiper performs hydraulic drive through a flexible pipe, is large in transfer torque, small in size and quick in response, is small in structural limitation during installation due to the fact that the hydraulic drive by means of the flexible pipe is adopted, is completely of a closed structure, is low in noise during working, is especially suitable for a complicated external environment structure and remote transmission, can adapt to vehicle of different models and is not influenced by the outside, the defect that the wiper motor is burned down due to an external obstacle is avoided, interior noise is effectively reduced, the interior comfort of a vehicle in running is improved, and a wiper rubber strip is supported by a flexible wall and can be well fit with a windscreen.