The invention relates to the field of high-voltage electrical equipment, in particular to a high-voltage switch barrel with an easy leak detection function and a high-voltage switch comprising the high-voltage switch barrel. At least one end of the high-voltage switch barrel is provided with a sealing structure used for being in seal fit with an adaptive end union piece; the sealing structure comprises a flange plate arranged at the corresponding end of the high-voltage switch barrel, and a seal ring arranged on the connecting side of the flange plate; a sealing part used for being in seal fit with the adaptive end union piece is arranged at the outer edge of the connecting side of the flange plate; moreover, a detection channel is arranged in the flange plate and provided with a communication opening and a detection opening, wherein the communication opening is located on the connecting side of the flange plate, the detection opening is communicated with the communication opening, the communication opening is located between the sealing part and a seal ring groove on the connecting side of the flange plate, and the detection opening is used for being matched with a corresponding leak detection device and being sealed by a bolt assembled in the leak detection device. The high-voltage switch barrel with the easy leak detection function and the high-voltage switch comprising the high-voltage switch barrel solve the problems that when an existing high-voltage switch barrel is used, leak detection consumes time and labor and the sealing performance can not be ensured.