The work aims to study the kinematic performance and trajectory planning of a series spherical scissors mechanism used in spherical surface decoration. The degree of freedom of the mechanism was calculated by screw theory and modified Kutzbach-Grübler formula. The kinematics model of the series spherical scissors mechanism was established by spherical triangle operation rule and coordinate transformation method. The forward kinematics and inverse kinematics of the mechanism were solved by Denavit-Hartenberg (D-H) quaternion method. The workspace of the mechanism was solved by Matlab software. The trajectory planning of the mechanism was simulated by SolidWorks dynamic simulation method and the kinematic performance was analyzed. Through the example, the kinematic performance of the mechanism running according to a given trajectory on the sphere was proved to be consistent with that according to actual planned trajectory. The mechanism has the advantages of large workspace, flexible movement and good motion performance and is suitable for engraving and spray painting on the spherical surface, and other related application fields.