Now a days most production lines of the industries are designed and equipped with necessary machineries initially which cannot meet the rising demand though their capability increase. The aim of this research was to find solutions towards solving the bottleneck and rectifying the line to improve productivity. This study is based on analyzing an existing production line in Meghna Group of Industry bottle production line which product has a rising demand. The processing time of different workstations with their capacity were collected as necessary data. Simulation was chosen as a tool to analyze the line as it is a frequent technique towards solving problems. The statistical analysis was done through Microsoft Excel software.  The existing simulation model was developed using process oriented simulation software Arena to find out the bottleneck of the production line. Also a modified model was proposed which reduces 14.11% waiting time and increases 4% productivity along with increment in profit to cope with rising demand.