The present invention relates to a thermostable freeze dried rotavirus vaccine formulation and the process of preparing the same. More specifically the present invention discloses multivalent thermostable liquid, powder or cake based rotavirus vaccine formulation prepared using the freeze drying process, such that the said vaccine formulation possess improved heat-stability, easy to use and transport and highly affordable thereby meeting the requirements of developing and low income country's vaccination program. The said freeze dried rotavirus vaccine formulation along with reconstitution buffer is so engineered to be suitable for filling in appropriate packaging containers/ closures so designed such that they reduce the logistics requirement for storage.