The invention relates to a method for preparing a barium acetate(BaTiO3)/Multi-Wall Carbon Nano-Tubes (MWCNTs) nano composite material, which comprises the following steps: using the MWCNTs, barium acetate, sodium hydrate and tetrabutyl titanate as initial raw materials, using deionized water, ethylene diamine and ethanolamine as solvents, adopting concentrated nitric acid to modify the surface of the MWCNTs, using a tetrabutyl titanate hydrolysis product as a titanium source, adding a dispersant, namely polyethylene glycol and polyvinylpyrrolidone, and adopting a solvent hot method to prepare and obtain the BaTiO3/MWCNTs nano composite material. By changing the proportion of the MWCNTs, the barium acetate and the tetrabutyl titanate, the BaTiO3/MWCNTs nano composite material with different compositions can be obtained. The prepared BaTiO3/MWCNTs nano composite material has good electric conductivity, the synthesis process and the production equipment are simple, and industrialized production is easy to realize.