<p><span style="font-family:Arial,Helvetica,sans-serif">The floristic-composition and structure study of existing agroforestry systems was carried out in the farmer’s fields of village Dariyapur (Site-I) and Alampur (Site-II) at Fatehpur district (Uttar Pradesh) during 2008-2010. The quantitative characteristics of vegetation were determined by the quadrat method. The floristic diversity study was made by adopting random sampling approach, under which, 20 quadrates of 10 m x 10 m were laid down. The density, frequency, abundance, IVI, Species –diversity, concentration of dominance, species-richness, equitability and beta diversity and other useful parameters for comparison of different types of existing agroforestry systems were analyzed by the simple arithmetic calculation. The study illustrated that <em>Acacia nilotica</em> was dominant in these sites with highest IVI values (24.91) in site- II (Alampur) lowest IVI values (22.04) in site- I (Dariyapur). Concentration of Dominance (Simpson Index) of tree species was higher in site -II (0.039) and lowest in site- I (0.032). Species diversity level among the tree species in site was observed and found higher in site-II (0.994) and lowest in site -I (0.934). Tree species equitability was same in site-I and site-II (0.055) while Beta-diversity was recorded highest in site –I (4.176) and lowest in site –II (3.944).Tree species-richness was recorded maximum in site –II (0.154) and minimum in site-I (0.149).</span></p>