Soil sample drying device

The invention relates to a soil sample drying device which comprises a supporting seat, a drying box and a heat source box, a containing cavity is formed in the drying box, the containing cavity is provided with an air inlet and an air outlet, a heat lifting device is arranged in the heat source box, the heat release end of the heat lifting device is communicated with the air inlet, the heat absorption end of the heat lifting device is communicated with the air outlet, and an air channel is formed among the heat absorption end, the heat release end, the air inlet, the containing cavity and the air outlet; a fan is further arranged in the heat source box, the fan and the heat release end are located on the same side, under the action of the fan, the heat absorption end at least absorbs heat from airflow exhausted from the air outlet, the heat is transmitted into the containing cavity through the heat release end, the soil sample to be dried contained in the containing cavity is dried within the preset temperat