Transformer of high-frequency spark vacuum detector

The invention relates to a component structure of a detector for detecting the vacuum degree by using high-frequency sparks, in particular to a transformer of a high-frequency spark vacuum detector. The transformer comprises a rectangular iron core; a primary solenoid and a secondary solenoid are wound on a frame at one side of the rectangular iron core in parallel; and the primary solenoid is separated from the secondary solenoid by a choke iron core which is connected between an iron frame that the two solenoids are arranged and a frame at the opposite side. Since the primary solenoid and the secondary solenoid are coupled at the same side of the frame of the iron core, the invention not only has compact structure and saves materials, but also reduces the flux leakage and improves the electromagnetic induction effect; especially under the condition that the output end generates short circuit, the current of a core device of the traditional high-frequency spark vacuum detector rapidly raises and heats; and however, a choke magnetic filed is added in the transformer, the current not only cannot raise, but also can be rapidly reduced, thereby the transformer is not easy to burn down and the service life of the transformer can be prolonged.