Abstract: Radio observation is the most important detection means to research the solar activity. The MingantU SpEctral Radioheliograph (MUSER) is mainly used to research the physical process in the initial energy-releasing area during the solar activity and its observation will open a new window in solar radio imaging. Imaging processing is an important part of MUSER data processing and improving the image quality is the most important research of data processing. Firstly, we introduce the basic theory of radio interference imaging. Secondly, we analyze the necessity of visibility data integration obtained from the MUSER observations. Then, we discuss in detail the two kinds of integration method which are short-term visibility data superimposed averaging and long-term UV overlay stacking and give out a complete realization. Through the method of verification and the validity of completion, the two kinds of integration method can effectively improve the signal-to-noise ratio and the quality of images.