The invention discloses a graphene array-loaded lithium titanate/carbon nanotube composite array electrode and a preparation method and application thereof. The preparation method comprises the following steps of utilizing a microwave plasma enhanced chemical vapor phase deposition technique to vertically grow a graphene array on a carbon cloth; utilizing an atom layer deposition technique to grow TiO2 (titanium dioxide) on the obtained graphene array; dissolving lithium hydroxide into water to form a solution A; putting the vertical graphene-loaded TiO2 composite electrode material into the solution A, performing hydrothermal reaction, washing, drying and calcining; utilizing a chemical vapor phase deposition technique, using acetylene as a carbon source, and growing a carbon nanotube on the graphene array-loaded lithium titanate composite array electrode under the hydrogen and argon atmospheres, so as to obtain the graphene array-loaded lithium titanate/carbon nanotube composite array electrode. When the graphene array-loaded lithium titanate/carbon nanotube composite array electrode is used as the negative electrode material of lithium ion batteries, the high-rate property and circulating stability are excellent.