This study focused on developing and evaluating the performance of cellulose/polyvinyl alcoholrnmicrobiocomposites. Cellulose has a potential to become a key resource in the development of biodegradablernfilms composites and therefore, incorporating microcellulose into different materials have become an attractivernresearch topics for production of micro-biocomposite materials. The objective of this study was to fabricaterncellulose reinforced polyvinyl alcohol micro-biocomposite materials and evaluate the effectiveness of thernreinforcement. The extraction of microcellulose was done by alkaline treatment with 8%-20%wt NaOH aqueousrnsolution with the ratio of 1:10 solid: liquid loading (w/v) in temperatures range of (40rnC) for (1hr-5hr) andrn36.65% optimum yield was obtained. The particle size analysis by dynamic light scattering (DLS) showed thernmean particle size found was 871.35Âµm confirming the product was microcellulose. The Fourier transformrninfrared spectroscopy (FTIR) indicated the effectiveness of pretreatment in removing lignin and hemicellulose.rnSolvent casting method was used to reinforce microcellulose in PVOH polymer. Water absorption test resultsrnshown that the reinforcement reduced the water absorption of the PVOH from 84% for neat PVOH to 62 % forrn8% MCC composite and from 84 % to 75 % for 4% SCB and 84% to 69 % for 4% MCC. Increment in tensilernstrength from 31 MPa for neat PVOH to 54 MPa for PVOH/ 8%MCC and reduction in elongation at breakrnfrom 355MPa for neat PVOH to 132 MPa for PVOH/ 8%MCC were observed from the mechanical property testrnresults. The SEM micrograph and optical transparency of the films showed uniform distribution and formation rnof network structure through hydrogen bonding.