Polypropylene has a special place in plastic industries. Polypropylene like other synthetic plastic doesn’t degrade by microorganisms, so remain in the nature and has a harmful effect on environment. Biodegradable plastic could help to solve this problem. In this article biodegradable blend of polypropylene and starch was prepared. Samples with different levels of starch (10% and 20%) were prepared. Pure Polypropylene and starch based samples buried in soil for 6 months and exposure to mould growth. Every two months samples removed from the soil and weight change were measured. Scanning electron microscope (SEM) approved Polypropylene/ starch blend biodegradation. Result approved that Polypropylene / Starch blend are degradable in soil.  This method could be used for reduce pollution in the environment. Samples were exposure to Pseudomonas aeruginosa for 84^th days. Pseudomonas aeruginosa consumed the polymer and confirmed biodegradability of compound.