The invention discloses a titanium-doped ternary metal organic framework material and a preparation method thereof. The preparation method comprises the following steps: (S1) preparing 5,5',5''-(((1,3,5-triazine-2,4,6-triyl)tris(phenyl-4,1-diyl))tris(acetylene-2,1-diyl))triisodecanoic acid from 5-diethyl iodophthalate and 2,4,6-tris(4-ethynylphenyl)-1,3,5-triazine; (S2) adding a first metal sourceprecursor, a second metal source precursor and 5,5',5''-(((1,3,5-triazine-2,4,6-triyl)tris(phenyl-4,1-diyl))tris(acetylene-2,1-diyl))triisodecanoic acid into a reactor, and reacting at 25-75 DEG C for 4-90 hours, so as to obtain a binary metal organic framework material mixed solution; and (S3) adding a titanium metal source precursor into the mixed solution prepared in the step (S2) in a molar ratio of (1-10) to (1-10), and carrying out ion exchange, so as to obtain the titanium-doped ternary metal organic framework material. The prepared titanium-doped ternary metal organic framework material is high in catalytic activity and good in hydrothermal stability and can be repeated used.