Mechanical properties and water resistance of Pulp/PLA high performance paper for heat molding were investigated in this paper. Especially, the properties of high performance papers before and after heating processes were examined. It is cleared here that the tensile strength can be obtained in the case of 20% content of PLA at heating time 30 min. and temperature 200 ̊C. And the water absorptiveness of presented paper decreases largely after heating process. The strength of paper under the wet condition decreases gradually with the increase of water. However it was shown that the strength was improved by mixing of PLA.