The 21st century is an information age as well as knowledge economy age. The rapid development of informationtechnology provides us with advanced teaching means—multimedia. It is true that multimedia has manyadvantages in English teaching, such as offering more information, saving more time, stimulating students’imagination and creativity, and so on. Although multimedia has many advantages, some scholars suggested that itshould not be used blindly. What we should know is that multimedia just only plays an assisting role inEnglish teaching. The thesis consists of four parts. The first part gives a general introduction of multimedia. Thesecond part illustrates the necessity of multimedia in English teaching. The third part elaborates the advantages ofmultimedia teaching and problems when we use multimedia. The last part gives some strategies on how to usemultimedia well.