Under the current production facilities equipment and technical available level in China,light engergy utilization efficiency and its main parameters influenced by light energy utilization efficiency of canopy cross section,canopy vertical section,photosynthetic organs and photosynthetic apparatus,were analyzed in greenhouse tomato,in order to exploit the solar energy utilization efficiency from the macro leaf canopy interception of light energy to micro original dynamics of light energy conversion and kinetics of photosynthetic synthase.The leaf light absorption coefficient(ε) of tomatoes in greenhouse was significantly different between genotypes and leaf position with red and blue light irradiation by using globale integral instrument.The leaf red and blue light absorption coefficient ratio(εred/εblue) of ‘Baoluota’ variety was more than 1,which indicated that leaf had strong absorption capacity to red light.However,the ratio of εred/εblue of ‘Harvest’,‘Laifu 60’,‘Hongli’ and ‘Israel 1498’ varieties was less than 1,which indicated that leaf of these varieties had strong absorption capacity to blue light.Increasing row space could inhibited effectively group unrestrained growth and decreased the leaf area index (ILA) by 22.3%,which could avoid closure of inside canopy.As the degree of leaf-cutting increasing,the tomato plant width in greenhouse significantly decreased,meanwhile the overlap rate of plant width(ξp),the overlap coefficient of leaf area(ξ) and complex light absorption coefficient (α) of canopy consisting with canopy leaves and canopy air space were all decreased accordingly.Using the techniques of cutting-half-leaf with the close-planting,namely,ear inferior leaves were cut 1/3-1/2 as fruit expanding stage to maintaining overlap rate of plant width(ξp) between 10% and 20% when the planting density increased by 17%-30%,achieved the double effects of both improving the light energy interception of middle and lower canopy and enhancing the groups photosynthetic capacity.