Drilling into the vertebra is a critical task in spinal surgeries. Traditionally, it is relied upon surgeon's intuition and experience. Robotic-assisted spinal surgery with fore feedback allows the drilling process to be performed automatically with much higher precision and safety. In this study, a new teleoperated robotic spinal surgery system with a frontend surgical instrument is designed, which is equipped with a force detection and feedback system. The proposed robotic system is manufactured and evaluated via laboratory and in vivo tests. Results prove the effectiveness of the system in precise teleoperation drilling, real-time force feedback, and achieving less surgical radiation exposure.