Four kinds of new metal organic complexes are introduced, namely, [ZnL ₁(cis-2-Butenedioicacid)2 ] _n  (complex 1), [Zn ₂(L ₁)2 (pnitrobenzoicacid) 2 ] _n (complex 2), [MnL ₁( p-nitrobenzoicacid)2 ] _n (complex 3), [Mn ₂(L ₁)2( p-nitrobenzoicacid) 2Cl2] _n(complex 4). The nitrogen donor in the triangular rigid ligand (L ₁=4-bromine-2,2′: 6′,2″ripyridine) is synthesized with the oxygen donor in the semirigid ligand (maleic acid and  p-nitrobenzoic acid). X-ray single crystal diffraction results show that complex 1 is one-dimensional chain structure, and complexes 2—4 are all zero microstructures. The infrared spectra (IR) and thermogravimetric analysis (TGA) of the complexes have been carried out. The results show that the complexes have good thermal stability. The antibacterial experiments of these crystals have been studied at the same time.