The invention discloses sulfur hexafluoride sampling equipment with high sampling purity for power equipment. The sulfur hexafluoride sampling equipment comprises a seat body, wherein a thick slide and a thin slide connected coaxial with each other are formed in the seat body; a slide block is inserted into the thick slide in a sliding manner; a screw tube is screwed to the outer end of the thickslide; the tail end of the screw tube is in sealed connection with an airbag; a sealing plug is clamped at the outer end of the slide block; a bypass is formed in the seat body; one end of the bypassis communicated with the middle of the thin slide, and the other end of the bypass is communicated with the thick slide; a vacuum chamber is formed in the seat body; a piston is arranged in the vacuumchamber; a pull rod is arranged on the piston; the inner end of the vacuum chamber is communicated with the inner section of the thin slide by virtue of a by-road; a connecting piece is arranged on the outer section of the thin slide; a sliding plug is fixedly arranged at the inner end of the slide block; a spring is arranged between the slide block and the thick slide; a magnetic block is mounted on the slide block; an electromagnet is arranged on the thick slide; a positive button and a deputy button are arranged on the seat body. The sulfur hexafluoride sampling equipment with high sampling purity for the power equipment is rapid in sampling, simple in operation, high in sampling purity, convenient to carry, labor-saving in operation, capable of being operated by one person, less in waste of sulfur hexafluoride and slight in environmental pollution.