Stop valve protective cover, outdoor unit and air conditioner

The invention provides a stop valve protective cover, and belongs to the technical field of household appliances. The stop valve protective cover comprises one or more through holes, one or more sliding rods and a protective piece arranged between the opening and a tether cable connecting opening and used for sealing a containing space, wherein the protective piece comprises one or more blocking parts, the sliding rods are correspondingly connected with the blocking parts, one ends of the blocking parts are connected with the corresponding sliding rods, and the other ends of the blocking partsare fixedly connected with the stop valve protective cover; and each sliding rod corresponds to one through hole, and the sliding rods slide in the through holes to control the blocking parts to sealthe containing space. According to the stop valve protective cover, the protective piece is additionally arranged, so that the hidden danger that the air conditioner outdoor unit is damaged and evensubjected to a fire due to