In this paper, we demonstrate and experimentally verify a tunable, multi-wavelength switchable ring-cavity erbium-doped fiber laser (EDFL). The hollow-core anti-resonant fiber (HC-ARF) filters, which are based on polarization interference, are fabricated using bent HC-ARF. These filters were incorporated into a ring-cavity EDFL, achieving the tunable laser output ranging from 1547 to 1561 nm with a tuning step of 3.5 nm, and all measured optical signal to noise ratio (OSNR) exceeded 35 dB. Additionally, the laser system supports switching from single-wavelength to three-wavelength operation near the 1560 nm region.