The invention discloses a high-voltage transformer and a monitoring system thereof, and relates to the field of power equipment. The high-voltage transformer comprises a transformer, a transformer support post, a support plate and a fixed plate, wherein two fixed posts are arranged on a surface of the fixed plate, the transformer comprises a hanging plate, a bottom plate and a device, at least twospring shockproof devices are arranged at a bottom surface of the bottom plate, the support plate and at least two fixed blocks are arranged at a side surface of each fixed post, and a draught fan, aremote data communication antenna and a monitoring camera are arranged on a transformer body of the transformer. A support structure having a shockproof and buffer effect is designed on the transformer body of the transformer, the draught fan, a wireless signal emission device and a monitoring camera device are arranged on the support structure, a clearance lamp and a cooling fan are arranged onthe transformer body of the transformer, a sensor is arranged in the transformer body of the transformer and is used for detecting an internal environmental, and thus, the problems of real-time monitoring of the high-voltage transformer, probably sliding, spontaneous combustion, collision by bird and aircraft at night are solved.