The invention relates to a pot-type insulator, which comprises an insulation pouring body which is of a pot shape, wherein the inner wall of a pot body of the insulation pouring body is smoothly connected with correspondent surfaces of a pot edge and a pot bottom respectively through a first arc surface section and a second arc surface section, which are tangential with each other, the junction part of the pot body and the pot edge of the insulation pouring body is embedded with a shield ring which is coaxial with the insulation pouring body and used for improving the distribution of an electric field on the edge surface of the insulator, and the shape of the shield ring is consistent with the shape of a pot opening of the insulation pouring body; and on the longitudinal cross section of an axis of the insulator, a contour line of the first arc surface section is of an arc section, the cross section of a ring body of the shield ring is of a circular shape or an elliptic shape, a symmetric axis of the cross section of the shield ring body is overlapped with an angular bisector of a central angle corresponding to the arc section, and the distance from the center of the cross section of the shield ring body to the top surface of the insulation pouring body is not smaller than the minimal insulation distance. Due to adopting the pot-type insulator, the distribution of the electric field of the edge surface of the insulator can be well improved, the flashover can be prevented, and the application requirement of a high-voltage insulator can be met.