His major work, Ravyah, also called Avi ha-Ezri (“My Father is my Help”), is a compendium of articles that developed into a book. It contains halakhot and legal decisions according to the order of the tractates in the Talmud as well as research on halakhic subjects which he calls “responsa.” Among these “responsa” are some genuine responsa written by him and his father to contemporary scholars. They are written in simple, lucid language, and are generally prefaced by rhymed introductions. In 1885 H. N. Dembitzer published tractate Berakhot with the relevant responsa from a manuscript of Ravyah to which he added his own notes, Livyat Hen. V. Aptowitzer continued the task in a critical edition (published by Mekize Nirdamim, Berlin, 1913; Jerusalem, 1935) up to section 893. He later published addenda and corrigenda (1936) and an introduction (1938). She'ar Yashuv Cohen and E. Prisman revised Aptowitzer's editions in three volumes (Jerusalem, 1965) and added a fourth volume covering sections 894–919. R. Eliezer also wrote Mishpetei Ketubbah, to which Seder Binyan Bayit Sheni (“The Order of the Construction of the Second Temple”) is an appendix. R. Yom Tov Lipmann Heller quotes it 15 times in his commentary on tractate Middot. Early authorities mention his Avi'asaf, a commentary on the orders Nashim and Nezikin, in addition to other material not included in Ravyah, which was seen by R. H. J. D. Azulai. He apparently also composed tosafot on various tractates; likkutim, consisting of explanations of passages of the Pentateuch; and six piyyutim. Although his chief purpose was the determination of the halakhah, R. Eliezer's approach to textual clarification and to the basic sources (Babylonian and Jerusalem Talmuds; rishonim) is reminiscent of the approach of the tosafists. His works were considered basic in halakhic literature until the publication of the Shulhan Arukh. The great codifiers relied heavily upon him and R. Eliezer of Metz called him “the pillar of decision and the foundation of halakhah.” He was also famous for his piety and for his ethical teaching, his contemporaries referring to him as “one who by his exhortations brought about repentance” (Ravyah, no. 922 in Ms.).

(ספרים היוצאים לאור על ידי חברת מקיצי נרדמים, שנה ד-יא, תרע"ג-תרפ"ט; שנה ב-ה, תרצ"ה-תרצ"ח, לחידוש פעולת החברה והעברתה לא"י). Added t-p.: Introductio ad Sefer Rabiah. Auctore ... V. Aptowizer ... מהדורת אפטוביצר מגעת עד סוף סדר מועד (סי' תתצג). חלקים נוספים של החיבור יצאו לאור בשנים תשכ"ה-תשמ"ט על ידי א' פריסמן, ש"י כהן וד' דבליצקי.

[כרך 1]: חלק א. הופיע בשתי חוברות, ברלין תרע"ג - תרע"ד (1913 - 1912). [כרך 1]: חוברת א: שער-מעטפת: ספר ראבי"ה ... חלק ראשון, חוברת ראשונה. דפוס צבי הירש איטצקאווסקי, תרע"ג (1912). [2], 320 עמ'. [כרך 1]: חוברת ב: שער מעטפת: חלק ראשון, חוברת שניה ... דפוס צבי הירש איטצקאווסקי, תרע"ד (1913). ,321-468 עמ'. [כרך 2]: חלק ב. הופיע בארבע חוברות, ברלין-ירושלים תרע"ד-תרצ"ה (1935-1913). [כרך 2]: חוברת א: שער-מעטפת: חלק שני, חוברת ראשונה ... ברלין, דפוס צבי הירש איטצקאווסקי, תרע"ד (1913). [2], 80 עמ'. [כרך 2]: חוברת ב: ברלין, דפוס צבי הירש איטצקאווסקי, תרפ"ו 340-81 עמ'. [כרך 2]: חוברת ג: ברלין, דפוס צבי הירש איטצקאווסקי, תרפ"ט (1929). [341]-490 עמ'. [כרך 2]: חוברת ד: ירושלם, (דפוס הספר), תרצ"ה. [491]-689 עמ'. [כרך 3]: הוספות ותקונים לספר ראבי"ה חלק ראשון ושני מאת אביגדור אפטוביצר ... ירושלם, (דפוס מרכז, תרצ"ו) 1936. [4], 196 עמ'. [כרך 4]: מבוא לספר ראבי"ה, מאת אביגדור אפטוביצר. ירושלם, (דפוס "מרכז"), תפרי"ח [תרצ"ח]. יב, 484 עמ'. [כרך 4]: שער נוסף: Introductio ad Sefer Rabiah. Auctore ... V. Aptowitzer