The utility model discloses a portable soil collector comprising a drilling cylinder, and further comprising a positioning base and a rotating device, wherein the positioning base comprises a positioning board and a positioning cylinder with openings at the two ends; a connection hole matched with the lower end of the positioning cylinder in shape is formed in the positioning board; the lower end of the positioning cylinder is fixedly arranged on the connection hole; the lower end of the drilling cylinder is sleeved inside the positioning sleeve; and the rotating device is arranged at the upper end of the drilling cylinder, and drives the drilling cylinder to rotatably sample. The portable soil collector provided by the utility model has the advantages of small size and light weight, and uses the rotating device to rotate the drilling cylinder for collecting soil, so that not only can time and labor be saved and the soil collection efficiency be high, but also the collection requirements of different soil layer samples can be met.