The invention discloses a medium voltage distribution power grid operation state visualization method, which belongs to the field of medium voltage distribution power grid operation state sensing and visualization. At present, the visualization of the medium voltage distribution power grid operation state is not effectively achieved through the conventional visualization process, the man-machine interaction is poor, a few options are available, and the application is not flexible. The method comprises the following steps: 1) selecting a base state diagram; 2) selecting the type of a state presentation diagram; 3) generating a state presentation diagram at the moment according to demands, and demonstrating, generating and showing a historical state diagram within a selected time zone, and generating and showing a state diagram of a selected future moment. By adopting the technical scheme, man-machine interaction is improved, different state diagrams and state presentation diagrams can be generated and combined into appropriate state diagrams, the state diagrams can be conveniently used, and the accuracy in making a decision is improved.