Abstract: Recursive Least Squares algorithm is widely adopted in the field of micro-vibration adaptive control because of its sim? plicity and speed. Due to the particularity and complexity of the disturbance environment in the micro-vibration active control appli? cation， the robustness of the parameter adaptive algorithm used in the micro-vibration control needs to be considered. For the Multi? ple-Input Multiple-Output （MIMO） active vibration control system， this paper presents a MIMO robust parameter adaptive algo? rithm based on an Infinite Impulse Response （IIR） filter. This robust parameter adaptive algorithm takes advantage of the dead zone and normalization. The deducing process and convergence analysis of the robust parameter adaptive algorithm are illustrated in detail. A 3-DOF real time micro-vibration control experimental platform has been constructed. Comparison are provided with sine disturbance， double sine disturbance and broadband disturbance. Experimental results confirm the feasibility and robust of the pro? posed algorithm.