The invention discloses a preparation method of a molecular forcipiform metal organic frame material having fixed coordination configuration and accurate regulation and control of a coordination bondlength. The material is prepared by three ligands of a fluorescence ligand TBPA, a material building ligand MTBC and an ion coordination environment regulation and control ligand. Through limitation of a metal organic frame structure, the 3 coordinated TBPA ligand and a series of a 1 coordinated ligand combinations partially replace the 4 coordinated organic ligand in a frame, the coordination configuration can be fixed, and the 1 coordinated ligand is changed to change the coordination bond length. The method has the advantages that based on unchanged metal coordination configuration, the coordination bond length is changed, the method can accurately and continuously regulate and control the metal coordination environment, and performance optimization can be achieved.