在原四杆机构空间模型理论基础上，建立了四杆运动链空间模型，并给出了四杆运动链的标准尺寸型及其关系式。在空间模型中，根据有无整周转动杆件又将其分成若干子空间，为进一步系统分析打下基础。该空间模型的建立，将使四杆机构的性能图谱大为减少，并可实现一图谱多用，为工程设计人员提供了方便 Based on the original four-bar spatial model theory, a four-bar kinematic chain space model is established, and the standard dimensions of the four-bar kinematic chain and their relations are given. In the space model, according to whether the whole rotation of the rod and then divided into subspaces for further analysis of the system to lay the foundation. The establishment of the spatial model will greatly reduce the performance of the four-bar mechanism, and achieve a multi-spectrum, which provides the designer with convenience.