The invention discloses a volute structure for an automobile air conditioner. The volute structure comprises a volute and an airfoil-shaped volute tongue. The contour line of the airfoil-shaped volutetongue is composed of an airfoil-shaped lower edge line, an airfoil-shaped upper edge line and two transition circular arc lines. One end of the airfoil-shaped lower edge line is connected with a volute line through the first transition circular arc line, the other end of the airfoil-shaped lower edge line is connected with the airfoil-shaped upper edge line, and the other end of the airfoil-shaped upper edge line is connected with a diffusion section straight line through the second transition circular arc line. The structure is reasonable, the front edge of the airfoil-shaped volute tongueis provided with the advantages that the dispersion effect is good, impact loss is low and gas flow separation at the volute tongue is reduced, the inclined volute tongue of a flaring structure is adopted, pulse airflow on the volute tongue is staggered, the advantage that the pulse force on the volute tongue is reduced is achieved, accordingly, rotating noise of a fan can be greatly reduced, andthe blast capacity is improved.