Microstructures, tensile strength, elongation and flexibility before and after annealing have been studied for 06 mm diameter MoLa wire made by powder metallurgy and pressure working, as compared with the same size of Mo1 wire. The results show that the recrystalling temperature of MoLa wire is 1 800, which is 600 higher than that of Mo1 wire. After complete recrystallization, MoLa wire has an interlocking grain structure. The tensile strength, plasticity and tonghness of MoLa wire is higher than those of Mo1 wire after high temperature annealing and/or recrystallization annealing.