The invention discloses a switchgear with a high-efficiency condensation preventive function and a power control system of the switchgear. The switchgear comprises a casing, a condensation mechanism capable of high-efficiency dehumidification is arranged in the casing, the condensation mechanism comprises condensation rods which are arranged uniformly along the inner side of the casing, the top rod of each condensation rod is fixed to the top wall of the casing, a flow deflector is arranged in the lateral side of the inner bottom of the casing in an inclined way, the flow deflector and the bottom sidewall of the casing form a drain tank the bottom end of each condensation rod is fixed to the middle of the flow deflector, a hydrophobic coating is arranged in the outer side of each condensation rod, the outer side of the bottom of the casing is provided with a water outlet corresponding to the upper of the bottom end of the flow deflector, and blowing pipes are uniformly arranged in thecasing. The switchgear is ingenious in structure and reasonable in arrangement, the dehumidification effect is improved greatly, switching equipment in the casing is prevented from condensation and influence on the safety, the safety of the switchgear is improved greatly, and superfluous gas is exhausted out of an exhaust hole in the outer side of the casing.