文学披头士而已；到书里找人生哲理，同记者问列农怎样达到世界和平是同一水平。连译名麦田守望着也不精确

It comes from an altered version of the song, Coming through the Rye.

" ... Holden finally decides to surreptitiously return home to see his younger sister Phoebe. During a short conversation with her Holden reveals the meaning of the novel's title: The "Catcher in the Rye" idea is based on a misreading of a line in the song "Comin' Thro' the Rye," [2] by Robert Burns, which Holden heard a young boy singing. The young boy instead substituted "When a body meet a body, comin' thro' the rye" for "When a body catch a body, comin' thro' the rye."

Holden imagines children playing a game in a field of rye near a cliff, and it is his role to protect the children by catching anyone who comes too near to the edge. Such a job, he says, would make him truly happy. Holden tells Phoebe he has always wanted to be a Catcher in the Rye (symbolically, a rescuer of children). Holden tells her his plan to run away, to live far away from everybody, and Phoebe offers him her Christmas money. Holden flees the house when his parents arrive home."
Source(s):
http://en.wikipedia.org/wiki/The_Catcher…