INTRODUCTION: Symplocos racemosa used in the treatment of eye disease, skin diseases, ear diseases, liver and bowel complaints, tumors, uterine disorders, spongy and snake-bite, bleeding gums, fever, asthma, gonorrhea and arthritis. The characteristic features of Cu nanoparticle were studied and were obtained. MATERIALS AND METHODS: Fresh lodgers bark powder was collected from the market, Chennai.1g of freshly collected Lodhra bark extract is mixed with 0.1 liters of distilled water thoroughly and boiled for 3-5 mins in heating mantle then filtered by using filter paper.0.861 g of CuSo4 powder is added in 0.5 liters of distilled water and to this lodhra bark extract was been added. The solution is kept in a shaker and the reading was taken for every 2 hrs to examine the synthesis of Cu nanoparticles. The characterization Of Cu nanoparticles is done by using Transmission electron microscopy(TEM) RESULTS: The size of the symplocos racemosa bark functionalized copper nanoparticles is 40-80 nm.while the shape appeared to be spherical, rectangular. The process is known as Solution reduction Process in which Cu nanoparticles were synthesized. CONCLUSION: Reduction method is best for synthesizing Cu(0) nanoparticles than the Convention method because that method is greener and environmentally suitable, cheap, and best. The surface area to volume ratio of solid-supported metal nanoparticles (1–100) nm in size is mainly responsible for their catalytic properties. In a further study, we will see the catalytic and biological properties of these nanoparticles.