A method for making a carbon nanotube micro-tip structure is disclosed. A carbon nanotube film structure and an insulting substrate are provided. The insulating substrate includes a surface. At least one strip-shaped recess is defined at the surface. The carbon nanotube film structure is covered on the surface of the insulating substrate, and has a suspended portion covered on the at least one strip-shaped recess. The suspended portion of the carbon nanotube film structure is laser etched, to define a first hollow pattern in the suspended portion and form a patterned carbon nanotube film structure according to the first hollow pattern. The patterned carbon nanotube film structure includes two strip-shaped arms. The two strip-shaped arms are joined at one end to form a tip portion. The tip portion is suspended above the strip-shaped recess.