The causes of the floating-debris on the surface of HoTmYLF melt, the scattering particles and the crack of HoTmYLF crystal during the Czochralski growth are analyzed in this paper. Through elaborately designing of the symmetry temperature field, and adjusting temperature gradient and the crystal growth process parameters, the scattering particles and the crack of the crystal are eliminated effectively. The growth atmosphere with a certain volume CF4 contributes to decreasing the floating-debris on the melt surface effectively, and the influence of the floating-debris on the normal crystal growth are overcome. By above technique ways, high-quality HoTmYLF crystals with the size of (25~30)mm×(100~120)mm are grown. The laser performance test of HoTmYLF crystal shows that under LD double-end-pumped conditions more than 10 W laser at 2.05 μm is achieved, and the laser slope efficiency reaches 41.2%, optical-to-optical efficiency reaches 36.4%.