Abstract: To explore the influence of different fertilization measur es on soil temperature change, the 10 cm soil layer soil temperature was continuous monitored in the treatments of NPKM, NPK, M and CK of a long-term fertilization experiment.The results showed that the 10 cm daily variation of soil temperature was sine curve and the soil temperature under different fertilization conditions reached maximum at 15：00—17：00, lowest 7：00—9：00. Compared with the control, the average temperature and accumulated temperature in different fertilization treatments were lower and the differences among them were biggest in the tuber growth period. The average temperature in NPKM, NPK and M were lower than CK respectively by 1.7℃, 1.3 ℃ and 1.1 ℃. The accumulated temperature in NPKM, NPK and M were lower than CK respectively by 86.0 ℃,83.0 ℃ and 68.0 ℃.