清代以來對《唐宋叢書》的評價存在許多歧異，特別是真偽本的分判，背後隱含著書坊在板片轉移後的重新編排。《唐宋叢書》現存有兩種傳本：一為繁本，收編全帙為主，根據目錄所收為88種，實際收書為90種，其中有兩本目錄缺載，另外《異林》一書，總括四種書，若採計之，則有93種之多。一為簡本，書名頁作「經德堂藏板」，所收多為重編《說郛》舊版，內容雖與繁本重疊，然多抽換或新增節錄之本。二種皆增列漢魏20種，故知該書編輯延續《廣漢魏叢書》而來。前人不明繁、簡二本有同名異實之別，故滋生淆亂。本文試圖比對二本編排之差異，說明二本編排上的延續性與特殊性，並考察所收各書的版本價值，以供近人利用《唐宋叢書》之參考。

The reviews and evaluations of Tang Song Congshu (The Collectanea of the Tang and Song Dynasties) have diverged considerably since the Qing Dynasty, particularly the differentiation between the authentic and spurious versions, which concerned the publishers’ rearrangement of the slips. There have been two versions of Tang Song Congshu passed down to date. The first is the complete version, a comprehensive compilation of 90 kinds of book a mong which two titles were missing in its table of contents, or 93 kinds if the four books included in Yilin is considered. The second is the abridged version. Most of its copies contained the term “Jingde Pavilion Collection” in its title. Reorganizing the early version of Shuofu, the abridged version replaced some books and added some shortened ones although its contents overlapped with the complete version. Both versions contained 20 kinds of books published during the Han and Wei Dynasties, from which we may infer that Tang Song Congshu was compiled by reference to Guang Han-Wei Congshu. Previously, scholars were unaware of the difference in contents between the two versions, hence widespread confusion. This article seeks to explain the continuity and peculiarity of the two versions by comparing their respective arrangements of contents and assessing the value of the books they included, thereby providing an alternative source of reference for scholars who are interested in Tang Song Congshu.