Under the condition of solid-liquid phase transfer catalysis, N-benzoyl- N’- benzothiazole thiourea (compounds 1) was synthetised using benzoyl chloride, ammonium thiocyanate and 2-aminobenzothiazole in the presence of PEG-400 as catalyst and methylene dichloride as solvent. Its structures were characterized by elementary, 1HNMR, IR. The interactions between compound 1 and anions(F-, AcO-, Cl-, Br-, I- and H2PO4- ) were studied by UV-Vis absorption and 1H NMR spectroscopy in DMSO. The results showed a high selectivity for F- and AcO-, however, no obvious interaction was found for Cl- 、Br-、I- and H2PO4-. The mole ratio method indicates that the compound 1 with F- through hydrogen bonds formed stable 1:1 complexes. 2:1 complex is formed between the compound 1 and AcO- anion through hydrogen bonding interactions.