Abstract: Field experiments were conducted from April to October in 2007 and March to July in 2017, on the Experiment Station of Agricultural Technology Promotion Center in Minqin County, Gansu Province and the Special Potato Experimental Base of China Agricultural University in Rizhao City, Shangdong Province, respectively. Three different films [black film(BM), transparent film(TM), no film(NM)] were taken to investigate their effect on soil temperature, potato growth and yield. The results showed that: (1) mulching could improve the soil temperature of 0-20 cm soil layer, and the transparent film’s warming effect was more significant, which accelerated the emergence of potato, but the relationship between the emergence rate and the film color was not displayed consistently; (2) plant height and dry matter quality were higher under mulching treatments, and the plant height was BM>TM in the whole growth period, however the dry matter quality was TM>BM, except in the tuber enlargement period; (3) in 2007, the final tuber yields of single plant and the yields among different treatments had uniform relations as: BM>TM>NM; in 2017, the final tuber yield of single plant was: NM>BM>TM.