A polymer-flooding eccentric sealing check seal section mainly solves the problem of poor sealing effect of the prior eccentric sealing check seal section. The utility model is characterized in that a leather cup inner body (4) is sheathed with a leather cup connecting sleeve (6), two ends of a lower leather cup (2) are respectively fixed on a leather cup base (1) and the leather cup connecting sleeve (6) through pressure caps (7), and an upper leather cup (8) is fixed between the leather cup connecting sleeve (6) and the leather cup inner body (4) through the pressure cap (7). The polymer-flooding eccentric sealing check seal section has the characteristics of good sealing effect and convenient detachment.