This paper proposed the solution of haptic feedback interaction, which can be used for 3D interaction in Virtual Spinal Fixation Surgery System. We frist introduced the traditional Proxy-based Volume Haptics solution, and then proposed the Haptic feedback primitive based on it. There are four Haptic feedback primitive: point, line, plane and direct force. The haptic feedback system developing model is composed by Haptic Rendering and Graphics Rendering. The paper designed interface and classes based on this model, and then implemented the haptic feedback system at last. With this system, we can feel the load carring condition, speed up the virtual operation and provide data analysis more accurately.