Friendship between classmates was a very important part of life. Friendship is a selfless emotion built on mutual respect, trust, and support. In a class or school, students come from all over the world, with different personalities, habits, and values. Therefore, it takes patience and hard work to establish a deep friendship. The importance of friendship between classmates was that it could bring the following benefits. First of all, friendship could enhance people's self-confidence and self-esteem. In a harmonious class or school, students helping and supporting each other can make one feel more confident and self-esteem, thus improving the quality of one's life. Secondly, friendship could promote the learning and growth of students. In a class or school, students can learn together and make progress together. They can encourage each other to improve their academic performance. At the same time, through mutual communication and sharing of learning experience, they could also expand their horizons and knowledge reserves to improve their overall quality. Third, friendship can promote social and interpersonal relationships between students. Helping and supporting each other in a class or school can expand one's social circle and make more friends. These friends might be of great help in his future life and work. The establishment of friendship between classmates required the joint efforts and trust of both parties. Both sides should respect each other's differences, understand each other, tolerate each other, and support each other. At the same time, both sides should be honest with each other, trust each other, and progress together. Only in this way can we build a true friendship and make it a precious asset in our lives.