Understanding the changes in structure and health state of forest vegetation and how it will response to such changes, is an important part of forest analyses. This study was carried out in Boutaleb forest, in order to analyze and to describe the dynamic and biophysical characteristics of Atlas cedar, by calculating the Normalized Difference Vegetation Index and determining the diameter and height parameters of three sample plots. These plots were be in three different type of formation Atlas cedar with holm oak in Ain laaneb station, Atlas cedar in Ghbaret agueni station and Atlas cedar with holm oak and Prickly juniper in Afghan station. We have chosen a superficie of 900m2 for each. Descriptive analyses of height and diameter of the species shows that the Atlas cedar characterized by the highest value. The NDVI values changes in the three sample plots, the highest values were detected in Ain laaneb plot.