1. A porous liquid conducting member with a smooth liquid conduction, the liquid conducting member (1) being provided with a hollow cavity (10) therein, and comprising an inner side (11) and an outer side (12); wherein the inner side (11) or the outer side (12) is configured to be in contact with a liquid, and is provided with an air exchange recess (13) to form a thin-wall (14) on the liquid conducting member (1); a wall thickness of the thin-wall (14) is smaller than a wall thickness between the inner side (11) and the outer side (12), enabling air to be conducted through the thin-wall (14); the hollow cavity (10) is a liquid storage groove defined in an upper side of the liquid conducting member (1); the air exchange recess (13) is located in a bottom of the liquid storage groove; a liquid supply hole (15) is provided in a bottom of the liquid storage groove, and the liquid supply hole (15) is a blind hole; and the wall thickness (a) of the thin-wall (14) formed by the air exchange recess (13) is smaller than a wall thickness (b) between a bottom of the liquid supply hole (15) and an outer side of the liquid conducting member (1).
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