The research progress on rapidly grown KDP-type crystals is summarized. By integrating the pipe system of the growth equipment, upgrading the continuous filtration system, developing the real-time monitoring system of the crystal growth process and the high-precision thermal annealing equipment, the integration of the crystal growth system is realized. The flow field of crystal surface is optimized through numerical simulation, the whole process is controlled quantitatively to realize the stable crystal growth and the crystal performance is further improved through high-precision thermal annealing. In order to solve the problem of pyramid-prism boundary of “point-seed” rapidly grown KDP-type crystals, the pyramidal-restriction long-seed growth method and the free-long-seed growth method are proposed in succession, which provide new technical schemes for the growth of large size and high performance KDP-type crystals.