The invention provides a high-voltage AC vacuum contactor. The high-voltage AC vacuum contactor comprises a housing, two pins A, two compression springs, two pins B, an upper lead-out copper bar, a transmission connecting lever, two clinohedrals, two rollers and the like, wherein the housing has a structure of a rectangular casing, the front portion of the casing is provided with a safety door, and the safety door can be open or closed; and a vacuum chamber is an enclosed vacuum chamber, the vacuum chamber is internally transversally provided with two conductive pins, the outermost end of the upper conductive pin is connected with the upper lead-out copper bar, and the outermost end of the lower conductive pin is connected with a lower lead-out copper bar. According to the invention, the opening and closing of the contactor are controlled through a cylinder, and at the same time, the contact speed of a contact is enabled to be faster through the speed amplification effect of the clinohedrals.