In this project，we will design a comprehensive experimental instrument of vortex optical interference and diffraction，which integrates vortex optical interference and diffraction on an experimental platform． In the project experiment instrument，the traditional laser is replaced by vortex light，which makes undergraduates contact with new interference and diffraction phenomena，and stimulates undergraduates’interest in cutting- edge technology．At the same time，the optical components of the experimental instrument can be adjusted to improve undergraduates’experimental ability and hands-on ability．The experimental instrument integrates four kinds of light paths in the structure，optimizes the light path on the small platform，and skillfully combines the two kinds of interference diffraction light paths in the small size through the beam splitter，which greatly saves the space occupied by the four kinds of light paths． This instrument has great application value in university physics experiment，optical experiment and scientific research experiment．