In order to explore the methods and techniques of soil salinization control to Carnation facilities cultivation in the plateau ecological zone, the characteristics of soil salinization under three different management models, i.e., company, network and farmers, as well as the correlations between soil EC value and soil-borne diseases of Carnation facilities cultivation were studied. The results showed that: the main components of soil salinization were nitrate and sulfate; significantly positive correlation existed between soil EC value and total salt content, the contents of SO42- and NO3-; soil EC values of surface soil (0-20 cm) were higher than those of subsoil layer (20-40 cm); plowing can reduce the concentration of surface-soil salts in the short term; the degree of soil secondary salinization was in an order of farmer＞ network ＞company; soil secondary salinization can obviously reduce the resistance of carnation to wilt disease, and also can reduce the resistance of carnation to blight damage to some extent.