The change of light and temperature in solar greenhouse of winter-spring and autumn-winter crops of different seasons and its influence on cucumber root as well as the uptake and distribution of Boron were studied in the article. The results indicated that the light and temperature in winter-spring was more beneficial to cucumber growth and development than in autumn-winter. In winter-spring cucumber root volume increased more quickly and the vitality of root increased gradually, autumn-winter root volume increase slowly and the vitality of root gradually descended. Uptake amount and intensity of Boron of cucumber in winter-spring was also obviously higher than in autumn-winter. Distribution of Boron in different part of cucumber in winter-spring was higher than in autumn-winter, with dominant tendency to leaf and lack to root. Application of Boron should adapt to the environment and plant development stage in practice.