The large-size NcLYLF crystals were grown by Czochralski method The suitable conditions for heat field system and growth procedure were founded During the growth of Nd:YLF crystal, the pollution of water and oxygen on melt were overcome. NdiYLF crystal boules in 25-30 mm diameter, 100-120 mm long were grown. Laser rods in 10 mm diameter, 100 mm long were cut out Laser rods with good optical homogeneity, no cracks, bubbles and scatters can be obtained.