The female rhino was killed in Bagori range of the Park and its horns taken away by the poachers, Park Director Sanjiv Bora said.
Patrolling forest guards found the fully mature rhino and some cartridges near the dead animal.
Eight people suspected to be involved in the killing have been picked up for interrogation.
This is the eleventh rhino killed in the Park by poachers during the current year.