The current study was performed to develop biodegradable films forming matrix composed from gum Arabic (GA) and different concentrations from Alpinia officinarum phenolic extract (AOE). The color indices, physical properties, surface shape, crystallinity, mechanical properties and thermal stability of produced films were investigated. The grafting of AOE extract inside GA films increased dark yellow color and reduced moisture, swelling, solubility and water vapor permeability (WVP) of films. Furthermore, the scanning electron micrographs showed uniform structure with rough surface and turmoil spots in the structure by increasing AOE concentration inside films. Additionally, physically interaction occurred between AOE extract and GA polymer was proven by using FT-IR analysis. The fabricated films showed satisfied thermal stability manners with declining trend by incorporation of AOE inside GA films. Furthermore, the developed films showed significant effects on reducing the changes of browning index and firmness of Agaricus bisporus caps during storage days compared with commercial packaging materials.