Hi Ganesh Kumar,
I have done similar import in my project as well. Let me share the details. After importing and adding excel importer I went on to create new template. I am sharing screenshots for your reference. After selecting template from excel file. Just follow these steps.
After following these steps and them use this template to import .xls file to get the value.
Hope it helps and let me know if you have nay questions around that.
All the best!!