In this work. dense and pinhole-free poly-para-xylylene (PPX) with high thermal stability. high insulating property and high lubricity has been designed as coating layer for Fe-based amorphous powder. Three ultra-thin PPX layers have been successfully deposited on the surface of FeSiBPNbCr amorphous powder via chemical vapor deposition (CVD) polymerization. https://www.setartradinges.shop/product-category/gambler-hat/