In this paper,the main parameters of affecting the result of ISSR-PCR amplification was analyzed using the materials of Cinnamomum camphora DNA and the optimal ISSR-PCR reaction condition in Cinnamomum camphora was established.The results showed that the optimum concentration of five important components i.e.MgCl_2,dNTPs,template DNA,primer,Taq DNA polymerase in 20 μL reaction system of ISSR was 2.0 mmol·L~-1,200 μmol·L~1,50 ng,200 nmol·L~-1 and 0.5 U,respectively.The appropriate annealing temperature was a...