The invention relates to the field of crop processing equipment, in particular to a small crop drying machine with temperature self-adaptability. The small crop drying machine with the temperature self-adaptability comprises a box body. The box body is supported by bases. Meanwhile, a movable cover body is installed on the box body, a fan is installed in the box body through an installation frame,and a heater is installed on the portion, located on one side of the fan, of the box body. A drying plate is installed in the box body, air inlets and exhaust outlets are formed on the portions, located on the two sides of the drying plate, of the side walls of the box body, and a temperature and humidity acquisition device and a controller are installed on the box body. According to the small crop drying machine with the temperature self-adaptability, the purpose of small-scale high-efficiency energy-saving drying of crops is achieved through adjustment of the air humidity content in a drying machine bin and the drying operation temperature, reasonable distribution of hot airflow guiding and flexible drying scale control.