Micro-fluidic chip and liquid control method

The invention relates to the field of liquid control, and discloses a micro-fluidic chip and a liquid control method, the micro-fluidic chip comprises a first polar plate and a second polar plate, and a liquid flow channel is formed between the first polar plate and the second polar plate; the liquid flow channel comprises a liquid storage area, a liquid separation area and a connecting area, the connecting area is located between the liquid storage area and the liquid separation area, and the liquid storage area is higher than the liquid separation area; the first pole plate comprises an electrode layer, the second pole plate comprises a driving electrode layer, the driving electrode layer comprises a first electrode, a second electrode and a third electrode which sequentially correspond to the liquid storage area, the connecting area and the liquid separation area, the third electrode comprises sub-electrodes distributed in an array mode, and the number of rows and the number of columns of the sub-electrode