六中曾是一所老牌名校，其前身是1923年创立的私立华北中学，现代著名教育家、时任北大校长蔡元培先生为学校的首任校长。新中国成立后，北京六中成为北京市教学质量最好的几所重点中学之一。然而文革期间，六中蒙受巨大灾难。1999年，六中与原北京市第二十八中学合并，组建北京市长安中学，六中校名不复存在。随后，长安中学又并入了一六一中学，原六中校址现为一六一中学的一处初中部。

No.6 middle school was a former school，Its predecessor is in 1923 created a private middle school in north China，Modern famous educator、As Mr. CAI yuanpei pku President for the school's first President。After new China was founded，Moved to Beijing for the teaching quality of the best one of several key middle school。But during the cultural revolution，No.6 middle school suffer great disaster。1999 years，No.6 middle school of Beijing ShiBaZhong learn the second with the merger，A Beijing changan middle school，No.6 middle school names disappear。then，Changan middle school and into the 161 middle school，The original no.6 middle school school now for the high school in a ChuZhongBu。