目前 ,我国大多数聋校从九年级开设了理科 (化学 )课程。由于这门课程开设较晚 ,受师资及教学设备等条件限制 ,一些聋校在教学中 ,往往只注重课堂教学 ,忽视了课外实验的作用 ,忽视了学生的兴趣培养和特长的发挥 ,使学生的综合能力没得到应有的提高。本文从有利于培养学生的观察能力、独立实验能力、分析解决问题能力 ,发展创造能力、形成表达能力等五个方面 ,通过教学实验 ,说明课外实验在聋校理科 (化学 )教学中的特殊作用 At present, most deaf schools in our country have offered science (chemistry) courses from the ninth grade. Due to the late opening of this course, teachers and teaching equipment and other conditions, some deaf schools tend to focus only on teaching in the classroom, ignoring the role of extra-curricular experiments, ignoring the interest of students to develop and expertise to enable students The comprehensive ability did not get the proper improvement. This article explains the special function of extra-curricular experiment in science (chemistry) teaching for deaf school through teaching experiment from five aspects such as developing student’s observation ability, independent experiment ability, analyzing problem-solving ability, developing creative ability and forming expressive ability