Degradable pipette is produced by fermentation of renewable resources such as corn, potato and crop orange stalk, and the high-purity polylactic acid prepared by further purification and polymerization is produced as raw material. The raw material of polylactic acid straw is crops, which is made by modern biological fermentation technology, and will not release toxic gases such as nitride and sulfide when incinerated. Under compost conditions, it can be degraded into carbon dioxide and water by microbial action within half a year.