The invention relates to a Ba3BP3O12 crystalloid, a growing method and the application thereof, belonging to the field of crystalloid growth. The Ba3BP3O12 crystalloid of the invention has the chemical formula composition of Ba (1-x-2y-2z) M (X) M (y)A (y) M (Z) 3 BP3O12, wherein, x, y and z are less than or equal to 0.35 and more than or equal to 0; M is one ion or a plurality of ions in Sr, Ca, Mg, Be, Zn, Eu, Mn and Yb which have +2 valent state; the M is one ion or a plurality of ions in Cr, Bi, Ti, Ce, Pr, Nd, Sm, Eu, Dy, Ho, Er, Tm and Yb which have +3 valent state; A is one ion or a plurality of ions in Li, Na, K, Rb and Cs; and M is one ion or a plurality of ions in Cr, Ti, Zr and Hf which have +4 valent state. The crystalloid produced by a flux growth method has the advantages of great hardness, good mechanical property, difficult cracking and deliquescence, easy processing and storing and the like, so as to be applied to the fields such as laser crystal, acousto-optic crystal, photorefractive crystal or photonic crystal.