COVID-19 pandemic has been devasting the world with increased number of patients day by day. Obesity which is itself a pandemic proving as key factor which increases the mortality in COVID-19 patients. Lockdown has changed lifestyle and eating habit of people which ultimately worsen the obesity problems . Person with obesity problem has large storage of adipose tissues .Obesity invites many metabolic disorders like diabetes’s and hypertensions. It has been observed to worsens the COVID-19 situation irrespective of the age and genders. In this article a systematic review on expected mechanism of increased severity of COVID-19 infection due to obesity and its various consequences has been compiled. ACE – 2 enzyme which is playing crucial role in the entry of corona virus into the host cell. Consequences like metabolic disorder, chronic inflammation and oro-naso-sensory perceptions .Renin angiotensin system playing important role and acting as bridge between COVID-19 and obesity relevance. Overall considering the effect of obesity on the COVID-19 , it may worsen the case and also increases the chances of the death , By this it may be concluded that obesity and COVID-19 has direct relations .