The invention relates to a preparation method of a lithium ion battery SnS2/CNTs/PPy composite anode material. The preparation method comprises the following steps: Step One, adding SnCl4.5H2O and thioacetamide to a polyethylene glycol solution, and sufficiently and uniformly stirring; Step Two, adding a carbon nano tube to the solution, and carrying out ultrasonic dispersion for 60 min; Step Three, transferring the solution obtained in the step two into an automatic reaction kettle of polytetrafluoroethylene, and carrying out furnace cooling after insulation treatment; Step Four, carrying out centrifugal separation on the solution obtained in the step three, washing with deionized water and absolute ethyl alcohol, and carrying out vacuum drying; Step Five, dissolving an SnS2/CNTs composite material obtained in the step four to the deionized water, uniformly stirring, adding lauryl sodium sulfate, adding pyrrole monomers and oxidizing agent, and stirring at room temperature for reaction for four hours; Step Six, carrying out centrifugal separation on the solution obtained in the step five, washing with deionized water and absolute ethyl alcohol, and carrying out vacuum drying. The anode material obtained by the preparation method is high in capacity and good in cycle performance, and has potential application prospects in the fields of portable electronic equipment, electric vehicles, aerospace and the like.