The invention discloses a transformer with a self-protection function. The transformer comprises a bottom plate, supporting columns, an iron core assembly and a controller, wherein the lower part of the bottom plate is provided with a fixed base, the lower part of the fixed base is provided with a buffer plate, the buffer plate is fixedly connected with the bottom plate by means of the fixed base,the supporting columns are arranged on both sides of the bottom plate, a bracket is arranged on the upper part of the supporting columns, the bracket is fixedly connected with the supporting columnsby means of bolts, a rain shelter is arranged at the upper part of the bracket, the inner sides of the supporting columns are provided with insulating plates, the insulating plates are fixedly connected with the bottom plate by means of bolts, the iron core assembly is arranged at the inner sides of the insulating plates, and a relay is arranged at the upper part of the iron core assembly. According to the transformer with the self-protection function, a temperature and humidity sensor and a vibration sensor transmit monitoring signals to the controller, the controller compares the monitoringsignals with normal values, and the controller drives the relay to operate and drives a circuit breaking protector to switch off when the monitoring signals exceeds the normal values, so that a transformer stops operating, thereby being capable of effectively protecting the transformer.