The invention discloses synthesis, a crystal structure, a luminescence property and application of a divalent manganese complex with efficient green phosphorescence and tribo-luminescence performances. By introducing bidentate chelate organic phosphine oxide with larger steric hindrance and excellent sensitization capability and taking a halide ion with a heavy atom effect as a ligand, a mononuclear Mn (II) complex with four coordination geometries is synthesized. Based on test results, the complex is a novel green phosphorescence luminescent material with high stability and luminous efficiency and long luminescence lifetime at room temperature, and simultaneously, the material further has tribo-luminescence performance at a crystal state. Therefore, the material can be applied to manufacturing phosphorescence luminescent devices, pressure-sensing luminous bodies, pressure detection sensors and display elements of other scientific instruments.