The influences of optoelectronic feedback on the polarization bistability in a 1550 nm vertical-cavity surface-emitting laser (1550 nm-VCSEL) resulting from continuously varying the bias currents along different paths are investigated experimentally. The results show that, typeⅠpolarization switching (PS) can be generated in a free-running 1550 nm-VCSEL through gradually increasing the bias current, while typeⅡPS emerges during the process of gradually decreasing the bias current. The bias currents of typeⅠPS and typeⅡPS point possess different value, i. e. polarization bistability (PB) appears in the free-running 1550 nm-VCSEL. After introducing positive optoelectronic feedback, the bias currents of typeⅠPS and typeⅡPS points are accordingly varied for different feedback strengths, and the width of the bistability loop shows a gradually decreasing trend with the increase of the feedback strength. After introducing negative optoelectronic feedback, the variations of the currents of typeⅠPS and typeⅡPS points are more complex with the increase of feedback strength, and the width of the bistability loop shows a generally decreasing trend with obvious fluctuation.