蘇軾〈與李方叔書〉，是寫給門生李廌的一篇書信文，信中主要提出了四點：一、推辭薦引之因。二、君子相交之道。三、指陳文章之病。四、信道自守之勉。勉勵李廌積學不倦，假以時日定能榮登金榜。然李廌仕途不順，於元祐三年赴考，時東坡知貢舉，眾人認為以李廌的文采和東坡的賞識當登金榜，可惜李廌落第，最終絕意仕途，抑鬱而終。此次考試引發不少議論，有蘇軾洩題的傳聞和蘇李交惡的記載，《石林詩話》謂：「（李廌）嘗以書責子瞻不廌己，子瞻後稍薄之」，即指〈與李方叔書〉這篇書信文。本文擬從〈與李方叔書〉內容探析，分析「不廌己」和「薄之」之因，再從史料及蘇李作品、書信往來著手，以證兩人情誼絕非一件應試之舉而有所變質，來駁詩話、筆記記載之誤。

The Song Dynasty Poet Su-Shi ＂A letter to Li Fang Shu＂ wrote a letter to his student Li Jian. The outline of this letter included: 1. the reason of refusing to recommend Li Jian to be a officer, 2. the way of interactive among literatis, 3. disadvantages of writing, 4. To encourage Li Jian to obey the morality and justice and to study hard, and one day will be success in official career. However, Li Jian didn't have a fortune, he failed in imperial examination and never be a officer in his whole life. There were critic in this examination, which included Su Shi released the exam topic, and quarreled between Su Shi and Li Jian. The contents of this article will analyze why Su Shi ＂did not recommend＂ Li Jian to be a officer, and refer to historical data, the articles and letters of Su Shi and Li Jian, to prove they had a strong friendship.