<p>The interactive computation and communication platforms make singular multiagent systems vulnerable to attacks and external disturbances. Therefore, it is necessary to design the adaptive protocol to prevent the insecurity factors in singular multiagent systems. The control objective is to drive the states of follower agents form formation control centered on the convex combination of leader agents within a finite-time and guarantees the reliability of systems. To achieve this goal, a distributed formation protocol with adaptive estimation performance is proposed to ensure the reliability of the singular multiagent systems under actuator attacks and state dependent uncertainties. On this basis, the state trajectories analysis in both reaching phase and sliding motion phase is adopted to solve the finite-time formation control problem. The conditions that the coupled formation tracking error system is impulse free and bounded over the whole finite-time interval are obtained, indicating that the finite-time formation control problem of singular multiagent systems is feasible. Finally, the numerical example of time-varying formation is provided to verify the effectiveness of the designed adaptive protocol.</p>