The improper disposal of polymers pollute water and soil, causing the death of fauna and flora, and when burned releases substances that pollute the atmosphere. The study of biodegradable polymers is the subject of much research due to the increasing need for substitute materials from oil, to reduce the environmental problems caused by them when improperly discarded. The use of Poly(lactic acid) – PLA - has increased a lot in the last years. Beside to be biodegradable, PLA can be recycled. Its recycling has been considered in some cases. To avoid poor applications for this polymer recycling (as recycling as filler in construction industry) this study consider evaluate the loss of mechanical thermal properties caused by successive recycling steps and relate this loss of properties with a drop in the melting point of polymer. PLA was processed by high impact mixing and pressing, several times and after each processing step it was evaluated by mechanical test, thermal and structural analysis (DSD and FTIR). Considering that after some number of recycling PLA must be discarded, the biodegradability of PLA after each processing step was evaluated too.