In this paper, a hybrid plasma waveguide with a V-shaped gain medium is proposed by combining a low refractive index material with a metallic material to achieve optical confinement at ultra-deep subwavelength scales using the tip of the gain medium. The results show that the optical confinement performance of the V-shaped gain medium can reach a better deep subwavelength level compared to the semicircular and rectangular gain mediums, while maintaining a large propagation length. At the optimal size of the gain medium width wrib = 200 nm, the quality factor is improved by 297 and 363% compared to the other two structures. In order to achieve a low-loss laser with high quality factor, considering the high loss of the traditional plasma material gold, this paper replaces the traditional plasma material gold with the material sodium, which has lower transmission loss and can reduce the gain threshold of the laser compared to the traditional plasma material gold. This waveguide can be used for communication in highly integrated systems.