The invention provides a feeding mechanism downward movement structure controlled by a presser foot lifting mechanism and a
sewing machine. The feeding mechanism downward movement structure includes a presser foot lifting
wrench, an eccentric shaft rotatably installed in a
machine housing, a dental
articulator having a second swinging supporting point, and a feeding tooth installed at one end of the dental
articulator; a sliding groove is formed in the dental
articulator, the eccentric shaft has a shaft body part and a shaft eccentric part eccentrically arranged on the shaft body part, the presser foot lifting
wrench is connected with the shaft body part of the eccentric shaft through a first transmission mechanism, and the shaft eccentric part of the eccentric shaft can be rotatably installed in the sliding groove of the dental articulator and cooperated with the sliding groove in a sliding mode; when a presser foot is lifted, the presser foot lifting
wrench swings around a first swinging supporting point and swings around the second swinging supporting point through a first transmission mechanism and an eccentric shaft driven dental articulator, so that the end, provided with the feeding tooth, of the dental articulator moves downward to the upper surface of a needle plate, the
effective height between the presser foot and the needle plate after the presser foot is lifted is ensured, and therefore a to-be-sewed material is easily delivered between the presser foot and the needle plate before sewing is started.