A novel 6-(P-2P-S) parallel macro manipulator used as the macro system of the cutting equipment for chromosome is put forward,which is characterized by some movement decouplings on the orthogonal posture and its good manufacturability.In order to explore the theoretical foundation of the manipulator,the kinematics performance and the attitude distribution properties in the orientation workspace are investigated. Based on the design feature,the position problem is analyzed to obtain the inversion of forward displacement.Then,the kinematics equation is derived,and the speed transmission evaluation indicators (Kv,Kω) are defined based on the Jacobian matrix.Finally,in consideration of the structure constraints,the distribution of the Kv and Kω in the orientation workspace is analyzed.Simulation results indicate that the Kvmax and Kωmax are close to the edges of orientation workspace,and they can be changed in the ranges of 0.970 9-1.179 1,and 8.586 5~10.978 3,respectively.By choosing appropriate Kv and Kω in the orientation work space,it can satisfy the different requirements of the parallel macro manipulator applied in other precision operating fields.