介词属虚词，比较抽象，并一词多义，是英语教学中的难点。笔者积多年的教学经验，认为运用直观法进行介词教学，可发挥学生的形象思维能力，弥补其逻辑思维之不足。 一、介词在英语中的地位、作用及特点 （一）地位与作用：１、使用极为广泛，几乎每页书中都有大量的介词存在 Prepositions are virtual words, more abstract, and the word polysemy, English teaching is the difficulty. The author plot years of teaching experience, that the use of intuitive method of prepositional teaching, students can play a visual thinking ability to make up for its lack of logical thinking. First, the position of preposition in English, role and characteristics (A) status and role: 1, the use of a very wide range of almost every book there is a large number of prepositions