Abstract: In this paper the methods of quantitative description and treatment of six kinds fundamental characteristics of flora was establishedas follows:1. Floristic abundance A_iq=n_iq/M_q (1)2. Floristic resemblance R_iq=a(iq)/M_q (2)3. Floristic acientness O_iq=(n_iqu/n_iq)/(m_qu/M_q) (3)4. Floristic growth of speciation S_iq=(n_iq-1/n_iq)/(M_q-1/M_q) (4)5. Complex of floristic elements F_iqp=(n_iqp/n_iq)/(M_qp/M_q) (5)6. Endemicity of floristie elements E_iq=(e_iq/n_iq/(e_q/M_q) (6)Secondary, the fuzzy mathematical methods of comprehensive judgement which had been used for the integrative comparison and evaluation of six kinds quantitative targets on the fundamental characteristics of flora was introduced. The integrative expressive formula of parameter on the fundamental characteristics of flora was established as follows:d_i=f(d_1i, d_2i, d_3i) (i≤t) (7)Last, based on the analysising of the spermatophyte floristic fundamental characteristics of 3 single flora, the applied circumstance of the integrative expressive formula of parameter on the fundamental characteristics of flora was discussed. The results was in correspondence with the paracticable circumstances.