The essential difference between the new and old curriculum standards in describing biology lies in the different accuracy of words. The new curriculum standards describe the major breakthroughs in biological science research more profoundly and concretely in the preface. For example, "Revealing the structure and function of DNA molecule" in the old curriculum standard and "Discovery of double helix structure of DNA molecule" in the new curriculum standard not only clearly point out the exact meaning of knowledge points, but also imply the arduous exploration process and important scientific significance of scientific research results. Secondly, the new curriculum standard not only plays an increasingly important role in solving the population problem, the resource crisis and the deterioration of the ecological environment, but also emphasizes that "with the continuous intersection, infiltration and integration with physics, chemistry, mathematics and other disciplines, biological science is increasingly showing its leading position".