The finite-time control problem of the conversion mode for tilt-rotor aircraft is investigated by a hierarchical design scheme. First, in view of the trimming solutions, the nonlinear model is transformed into a linear switched system related to the system parameters to simplify the control design. Second, a new sequential layered switching mechanism is proposed with time-dependent law of outer layer system and state-dependent law of inner layer system, which releases the requirements of initial conditions and leads to a better tracking performance. Moreove, the inherent interval for each subsystem effectively avoids the Zeno behavior. Finally, the simulation result about XV-15 aircraft is illustrated to show the effectiveness of the proposed method.