The work aims to provide a general design method for virtual assembly parts, so as to realize the assembly method of multi-position and multi-rotation state determination and flexible assembly sequence planning. Firstly, multiple positioning points were used for collision detection to determine the position and rotation status of the part, then the binary integer was adopted as the part status code to express the assembly dependency between the parts, and finally the verification algorithm of the binary operation expression was applied to limit the value of the part status code to determine whether the parts could be assembled, thus achieving the planning of assembly sequence. The assembly method made all parts have a general design scheme. For special parts, only special positioning points were required to be set. In the assembly sequence planning, a variety of flexible assembly sequence designs were achieved, and the assembly logic relationship was more clearly expressed. Through multi-point positioning and status verification, a highly versatile and extensible virtual assembly technology can be realized.