The invention discloses a compound containing a pyrazole structural unit, a preparation method and an application. A structural general formula of the compound containing the spirofluorene structural unit is shown as a formula I. The nuclear magnetic detection of the compound is correct, the compound can be used as an OLED monomer material, and has important application value. The compound has the main advantages that 1) the synthesis is relatively simple; 2) the compound has high efficiency stability and good glass transition temperature; and 3)the device produced by the OLED material has the advantages of low original voltage, high luminescence efficiency and good chromaticity coordinate.