This paper studies Lu You's farewell essays for departing friends. First, explains the meaning and content of farewell essay, and the writing time and place of Lu You's farewell essays for departing friends. In the preceding two essays, although Lu You's official career is not brilliant, but with impassioned essays. In the adscript three essays, Lu You is already a 84 years old person, he can accept all favourable and adverse circumstances, and turn his mood to peace.