Study on Statistical Analysis in the Characteristics of Frequency Changes of Typhoon Landed in China

China is one of the countries suffered the most serious typhoon disasters in the world. Typhoons have occurred frequently, which resulted in the loss and impact, and caused widespread concern and attention of the international community. Therefore, it is urgent to analyze the main features of typhoon and the evolution of typhoon disaster of China. By analyzing the typhoon landed frequency changes of China since the 20th century, theoretical support would be provided and more targeted defense work of typhoon would be done which could put forward countermeasures and suggestions of typhoon defense work in China.