A method for making carbon nanotube film includes providing a first patterned carbon nanotube array and a second patterned carbon nanotube array having a predetermined pattern, wherein the predetermined pattern is a parallelogram. An acute angle of the parallelogram in the second patterned carbon nanotube arrays is adjacent to an obtuse angle of the parallelogram in the first patterned carbon nanotube array. A carbon nanotube film is pulled out from an acute angle vertex of the first patterned carbon nanotube array. A carbon nanotube film preform is pulled out from an acute angle vertex of the second patterned carbon nanotube array and the carbon nanotube film preform is connected to an obtuse angle vertex of the first patterned carbon nanotube array. And then, the carbon nanotube film continues to be pulled.