The invention relates to a buried transformer substation with an alarming function. The buried transformer substation comprises a box body arranged under the ground, wherein a protection cover plate is arranged above the box body; a middle interlayer is arranged in a box wall of the box body; a semiconductor refrigeration chip is arranged in the middle interlayer and the middle interlayer is filled with refrigeration liquid; a heat dissipation sheet is arranged on a side wall of the box body; the inner part of the heat dissipation sheet is communicated with the middle interlayer in the box wall; the semiconductor refrigeration chip is connected to a power supply through a first electromagnetic relay; the box body is internally further provided with a temperature sensor; the box body is internally further provided with a draught fan; an air outlet of the draught fan is connected with a dryer through a pipeline; the dryer is internally provided with a moisture absorption layer and a heating layer; the moisture absorption layer is internally filled with calcium oxide powder; the heating layer is internally provided with an electric heating wire; the draught fan and the electric heating wire are both connected to the power supply through a second electromagnetic relay; and the box body is internally further provided with a humidity sensor.