Due to the influence of crystal size and nonlinear optical properties, the available nonlinear crystals are very limited. As a traditional largesize photoelectric material, DKDP crystal has been applied in optical parametric chirped pulse amplification (OPCPA) devices. Highly deuterium DKDP crystals have better optical properties, but the growth of highly deuterium DKDP crystals has more stringent requirements on the growth environment. In this paper, highly deuterium DKDP crystals were successfully grown by rapid growth of point seed crystals through an improved raw material synthesis tank and the growth tank. The samples were prepared according to the type I (θ=37.23°, φ=45°) cutting method, and their deuterium content, transmittance, optical homogeneity and laserinduced damage threshold of crystals were tested. The results show that the average deuterium content of the crystal reaches 98.49%, and the crystal has a wide transmission band and high transmission performance in the visiblenear infrared band. The test results of Ron1 show that the laserinduced damage threshold of DKDP crystal reaches 19.92 J/cm2 at 3 ns, 527 nm. The rootmeansquare of optical homogeneity of the crystal reaches 1.833×10-9, indicating that the crystal has good optical homogeneity.