For the problems of low efficiency and non-standardization in the engineering drawing annotation information during the spacecraft assembly process, the function of assembly information annotation is redeveloped on the Creo platform to realize the automatic association of annotation text. By batch-selecting the annotation objects in the model tree or engineering drawing view, the assembly information is displayed and presented in the form of annotations. The annotation content includes the name, code, fastener information, thermal control information of the equipment or attached parts installed on the board. And through a set of intelligent layout algorithms based on the view contour, it is ensured that the automatically generated annotation information is reasonably laid out on the drawing. This study not only effectively solves the pain points of the current spacecraft assembly work, but also provides a useful reference for similar application scenarios in other manufacturing fields.