Vector network analyzer convenient to maintain

The utility model relates to the technical field of communication test instruments and meters, and discloses a vector network analyzer convenient to maintain. A driving assembly composed of a first screw rod and a first guide sliding rod, a second sliding groove plate, a sliding seat, a movable connecting plate and a movable plate are matched with a vertical guide sliding assembly arranged between a movable mounting plate and a protection box, the movable mounting plate is vertically moved upwards and downwards, and the position of a vector network analyzer body is adjusted; a driving mechanism formed by a two-way screw rod is matched with a moving block to enable a plurality of second sliding grooves to move away from or close to each other, and a second guide sliding rod, an L-shaped movable mounting rod and a third guide sliding rod are driven along with the second sliding grooves; the cooling fan is always located at the side edge cooling part of the vector network analyzer body, the cooling fan is used f