In lattice vector quantization，the codebook is made up of lattice points as quantization vectors. It is essential to give an index to a lattice point，so that the output of quantizer can be stored or transmitted. In our study of data compression，an entire research is given to the problem of the index of lattice points in pyramidal lattice vector quantization，and index algorithms are presented to index the lattce points of some usually-used lattices，such as Z^L、D_L、E₈ and ∧₁₆so on.