The invention relates to a soil sampling rod structure for a soil sampler. The soil sampling rod structure comprises a soil sampling rod body, wherein the soil sampling rod body comprises an upper lead screw and a lower soil sampling sleeve; the upper end of the lead screw is provided with a handle; the lower end of the soil sampling sleeve is connected with a conical sleeve. Compared with the conventional soil sampling rod, the soil sampling rod structure has the advantages that the lower end of the soil sampling sleeve is connected with the conical sleeve, so that a soil sample is prevented from being separated from the soil sampling sleeve, one-time sampling is realized, and the sampling efficiency is increased.