Based on expounding the definition and features of the photoengraved western language books,this paper probes into the cataloguing format of the photoengraved western language books,and advances the assumption of the format unification of implementing the photoengraved western language books.

MARC21 format for bibliographic data and description of authorized facsimile copies in Western languages;

Cataloging of Authorized Western Language Reprints;

Aimed at the disagreement phenomenon of the description of Authorized photo-offset western language books,connecting with"CALIS description main point of authorized photo-offset western-language books",the author probed into ISBN、title/author、edition items and so on,and put forwards to several suggestions about standarding the description of Authorized photo-offset western language books.