The invention provides a magnetic resonance interventional imaging method and system based on low rank and sparse decomposition, and a medium, and the method comprises the steps of: 1, continuously collecting k space data in a golden angle radial sampling mode in an interventional process; 2, grouping the collected k space data; and 3, reconstructing a magnetic resonance intervention image by adopting a method based on low-rank and sparse decomposition and framelet transformation. According to the method, based on grouped k space collection and reconstruction, reconstruction can be carried out under the condition that little data is acquired, the time resolution is high, and the real-time performance is good.