Abstract: ZB2375-type zinc borate（2ZnO&#8226;3B<SUB>2</SUB>O<SUB>3</SUB>&#8226;7.5H<SUB>2</SUB>O）was synthesized by solid state reaction under microwave radiation with zinc sulfate and borax as raw materials and a new technological route for production of zinc borate was designed.The factors affecting the ratio of B<SUB>2</SUB>O<SUB>3</SUB> to ZnO of zinc borate were studied in the experiments,nd the product was characterized.The results of experiments indicated that the radiation intensity and ingredient ratio had great effect on the ratio of B<SUB>2</SUB>O<SUB>3</SUB> to ZnO of the product.The crystal water-losing temperature of the prepared product was 170～230 ℃,hich was closed to the temperature of zinc borate ZB2375 by means of differential thermal analysis；the spectrum line position and relative intensity of spectrum of X-ray diffraction(XRD) were in agreement with the standard spectrum of zinc borate（2ZnO&#8226;3B<SUB>2</SUB>O<SUB>3</SUB>&#8226;7.5H<SUB>2</SUB>O）;oreover the crystal was irregular shape by analysis of scanning electron microscopy (SEM) and the average diameter of particles was about 1.5 μm.<BR>