The kinematics model of the six degree of freedom (6DOF) modular robot was set up with the DH parameters method. The robotic workspace of the modular robot was analyzed and simulated based on the MonteCarlo method and MATLAB software programming. The analysis results verify the provided structure of worktable’s rationality, prove the trajectory planning of workspace, 〖JP2〗and can well perform carrying task of holding assembly, which lay a foundation to further study the trajectory planning and motion control.