The invention discloses a fixed vacuum
capacitor with a
short circuit function, which comprises a vacuum
capacitor body, a movable conducting rod is arranged in the vacuum
capacitor body, and the conducting rod is configured to connect two
electrode groups of the vacuum capacitor body when the conducting rod deflects along a set direction so as to realize
short circuit of the vacuum capacitor body. The movable conducting rod is arranged in the vacuum capacitor body, and when the conducting rod deflects, the two
electrode groups can be connected to realize
short circuit, so that the fixed vacuum capacitor has a short circuit function under the condition that the volume of the fixed vacuum capacitor is not changed; according to the design, the tedious problem that the
circuit design of the
radio frequency matcher needs to be changed by dismounting the fixed vacuum capacitor in specific scenes such as test and debugging of the
radio frequency matcher and design of double-frequency and multi-frequency matchers is effectively solved, and the operation convenience is greatly improved; the specific requirements of a user for rapidly switching the working frequency and changing the
circuit design of the
radio frequency matcher are met, and the working efficiency is improved.