Following the success of nylon-clay nanocomposites developed by Toyota, there has been an increasing interest in different polymer-clay systems with the aim of producing environmental friendly materials exhibiting enhanced mechanical, barrier, and electrical properties yet retaining a wide range of processing options. Biodegradable polymers from inexpensive renewable resources are gaining attention in both academic and industrial domains. Over the past 20 years aliphatic polyesters have attracted much interest as biodegradable materials. They have numerous applications ranging from environmentally friendly packaging materials to control-released drug delivery agents, artificial sutures, and polymer matrices for tissue engineering. However, the applications of these aliphatic polyesters polymers are limited because of their deficiencies in mechanical and barrier properties towards water and gases. To overcome this drawback, one option is to incorporate an environmentally acceptable filler to improve the properties of such biodegradable polymers particularly for use as packaging materials. Natural phyllosilicates such as beidellite (BDT), located at Taghazout in Morocco, appear as suitable fillers that are cheap natural abundant resources, ecofreindly, and being of great socio-economical relevance. This paper aims the valuing of the Moroccan clay as nanocharge to prepare green nanocomposites with biodegradables poly(butylenes adipate) (PBA) by in situ polycondenastion of Diol and Aliphatic acid dicarboxylic using organometallic catalysis based on titanium in order to improve their properties. To obtained nanostructed composites, different parameters will be controlled such as the nature of organoclay (1CEC, 3 CEC and 5CEC-BDT) and their percentages. Characterizations of the resulting bionancomposites had been also performed (FTIR, NMR, TGA, XRD, TEM). The nanocomposite PBA / 2% 3CEC-BDT has an improvement thermal properties.