Abstract: Robust finite-time boundedness and L₂-gain analysis of a class of nonlinear switched systems with parameter uncertainties are discussed. Firstly, based on average dwell-time approach, robust finite-time boundedness theorem is presented under two classes of disturbance inputs and the corresponding linear matrix inequalities (LMIs) criteria is established. The results of robust finite-time boundedness is then applied to explore the L₂-gain problem, reducing all the proposed conditions into feasibility problems involving LMIs. Finally, the effectiveness of the proposed method is verified by testing an example.