The invention discloses a high-safety power supply box, which belongs to the technical field of power supply boxs. A
water cooling box is arranged at the bottom end of the power supply box, air flows through cooling liquid to be cooled, then is dehumidified through a
moisture absorption embedded sheet and flows through a dispersion air plate to be guided into the power supply box, and the heat dissipation effect on the power supply box is improved; a pair of
refrigeration pipes connected with a
heat conducting plate is arranged in the
water cooling box, when the power supply box is at a high temperature, the high temperature is transmitted to an elastic
magnetism isolating bag, and matched with gas expanded after heating, the elastic
magnetism isolating bag is promoted to expand outwards to weaken the
magnetism isolating effect on an upper magnetic sheet, and the upper magnetic sheet repels and pushes a
lower half pipe downwards to promote the
lower half pipe to be separated from the upper half
pipe; the cooling liquid is guided into the
refrigeration bag through the exposed drainage pipe, saltpeter particles absorb heat and are cooled when encountering water, on one hand, low temperature is directly transmitted to the power supply box through the
heat conducting plate, on the other hand, the low temperature is transmitted to the cooling liquid, the
refrigeration effect of the
water cooling box is enhanced, air is further cooled, and the power supply box is effectively prevented from being damaged due to overheating.