Wiper blade unit with bionic surface, wiper blade and window wiper

The invention relates to a wiper blade unit with a bionic surface, a wiper blade and a window wiper. The wiper blade unit comprises the wiper blade, a liquid outlet, a sensor and a control unit. A hexagonal columnar structure array is arranged at the bottom of a wiper blade, namely on the bottom surface in contact with a cleaned surface, a liquid outlet allowing cleaning liquid to seep is formed in the array, and a liquid outlet capable of spraying the cleaning liquid in the moving advancing direction is also formed in the side face of the wiper blade. In addition, the environment temperature is monitored based on a temperature sensor, and a proper amount of cleaning liquid seeps out of a liquid outlet in the bottom of the doctor blade under the high-temperature condition to physically cool the doctor blade to delay aging. The self-cleaning wiper blade can achieve the precise, directional and quantitative self-cleaning function, can effectively reduce cleaning liquid consumption and delay aging of the wiper b