The plastic greenhouse inside and outside temperature of soil temperature in autumn 2011 to the spring of 2012 in Yanbian area,Jilin province were determined,in order to study the soil temperature change rule of winter plastic greenhouse and determine grape safe buried soil anorak thickness.The results showed that the temperature inside and outside of shed difference was bigger when winter began to cool,and the minimum temperature inside and outside of shed changed smaller when spring began warming,the maximum temperature changed and the minimum temperature changed instead inside and outside of shed and temperature range larger.Soil temperature variation amplitude was smaller inside shed and insulation resistance was stronger,in the plastic shed,safety buried soil thickness was 20 cm(Wangqing country of Jilin province).If use some heat preservation material or cultivate stronger frost resistance grape variety could reduce the safe buried soil anorak thickness.The lowest soil temperature difference was not big inside and outside of winter plastic shed,the difference was plastic shed outside soil temperature drop speed relative low,temperature fluctuation was small,but low temperature maintained a long time.The maximum temperature and the minimum temperature of the plastic shed in winter appeared time relatively concentrated and in average 1～2 h earlier than outside of shed；the maximum temperature and the minimum temperature of the plastic shed in winter appeared time compared to the relative delay time increased with the soil anorak thickness increased and appear time dispersion.