Historical parks are currently recreational areas. Recreational load leads to digression of Park flora, vegetation and soil cover. The Park of the Museum-reserve “Gatchina” insufficiently investigated the consequences of recreational stress on fl ora and vegetation. In the summer of 2018 on the territory of the Palace Park of the Museum-reserve “Gatchina” conducted fl oristic and geobotanical survey of vegetation. According to the results of the research, a summary of the flora of higher vascular plants was compiled. The systematic, ecological and cenotic analyses, the analysis of life forms are carried out, rare and protected species of plants are defined. Based on the analysis of flora and vegetation, the degree of their recreational digression was assessed. Measures have been developed to maintain and expand floral diversity in the historic Park complex.