This paper deals with the application of nano technology in the pyro industries located in Sivakasi. This paper also gives information about the geography, history, location of industries, pyro powder manufacturing companies, application of SEM, ball mill present in Sivakasi. Sivakasi is one of the most mega industrial centres present in India. Sivakasi is also called as Kutti Japan due to the enormous amount of industries present in the heart of the city. It is one of the important holy places present in the country. It is having hot climate throughout the day. Nowadays, due to El - Ni?o the climate conditions were changed. There is an abundant rainfall in the summer season also. This paper is useful for the students to study about the pyro industries present in sivakasi and the applications of nano technology in the pyro industries present in the city. Hereafter, the pyro industries using the nano technology for the improvement of the quality and performance of the fireworks present in Sivakasi shall also be called ?Nano pyro industries? and the city can also be called as ?Nano Pyro Industrial City?. Pyro industries are present in the city due to the low annual rainfall and the dry climate present in the city throughout the year. The land in Sivakasi is also called as ?Sulphur land? due to the heavy temperature in the city. Nowadays, the trend is changed due to the climatic changes caused by El ? Ni?o. In the year 2015, the summer season in sivakasi was converted into rainy season by the climatic changes caused by the unstable changes in the winds from the Bay of Bengal.