The disposable sterilizing filter is made of medical-grade polypropylene material. It is in single package with paper seal easy to tear. It adopts EO (ethylene oxide) sterilization process which is suitable for sterilization and filtration of lab bio-fluids, culture media, and/or media additives. It has no heat source, no endotoxin, no DNA enzymes, no RNA enzymes in the filtration process,and thus has high stability and compatibility.