Abstract: Make full use of the reciprocal lattice basis vectors and punctuality array vector mutually reciprocal characteristics, the general solution formula of crystal plane angle was deduced, and by means of core matrix and numerical calculation of MATLAB language, the general crystal plane angle program was solved, and how to use the program to solve the crystal plane angle of arbitrary type crystals was introduced, then the procedure of solving crystal plane angle was verified, it is shown that the program have good application value in crystallographic studies.