The invention provides a volute tooth shaped line, a volute plate structure and a compressor comprising same. The volute tooth shaped line is characterized in that a main bus comprises a central involute, a transition involute and an outside involute which are continuously arranged from center to the outside, wherein the central involute is a base circle involute; the transition involute is a variable-diameter base circle involute; the outside involute is a base circle involute; and the radius of a base circle is the maximum radius of the base circle of the variable-diameter base circle involute. According to the volute tooth shaped line, the variable-frequency base circle involute is introduced, so that the wall thickness of the volute plate is increased, and as a result, the radial gas leaking is reduced, and the volute compression ratio is increased.