The invention relates to a spiral carbon nanotube rope, in particular to a preparation method of the spiral carbon nanotube rope. The invention discloses a method for preparing the spiral carbon nanotube rope. The invention adopts ethyne as carbon source, hydrogen as carrier gas, nitrogen or argon as diluent, nickel sheet as catalyst and PCl3 as catalyst promoter. And the spiral carbon nanotube rope is made at a relatively low temperature by chemical vapor deposition process. The method of the invention has simple and easily controlled process, low cost and high yield and purity and can be put into industrial production conveniently; the prepared spiral carbon nanotube rope can be widely applied to various fields, such as structure strengthening, absorbing material, electromagnetic shielding material, microelectronic device, etc.