In order to evaluate the effects of different treatments of leaf removal on different characteristics such as yield and yield components in two early maturing cultivars of sunflower, Megasun and Hayson36. An experiment was conducted in the educational-researching farm of Miyaneh branch, Islamic Azad University, in the 2015 and 2016 growing season. The experiment design was factorial based on randomized complete block design with 3 replications. Additionally, shrub morphologic and physiologic characteristics, shrub dry weight, chlorophyll contents, leaf area index (LAI), harvesting index(HI) and oil yielding were studied. Results demonstrated that among different treatments of leaf removal, yield components and studied traits existed significant different. Also, between cultivated cultivars, statistically observed no significant different among studied traits other than head diameter, chlorophyll contents, LAI, HI, the weight of 1000 grain, seedlessness percentage, seed and oil yielding. In this experiment, interaction effect between different treatments of leaf removal and cultivars with studied traits other than head diameter, chlorophyll contents, HI, seed number in head and, the weight of 1000 grain were not significant. The correlation coefficients traits reduce grain yield and oil treatments to remove the whole leaves in the middle one-third reduction stems from two factors seedlessness percentage and weight of 1000 grain. That appears to reduce the performance of treatment discontinuation in the middle one-third more affected weight in 1000 grain is located. Correlation of traits also showed a positive and significant relationship between the traits of seed number in head,