An experimental method was established by extracting cAMP-phosphodiesterase (PDE) from porcine neutrophils and detecting its activity, which can be used in veterinary clinic to explore its physiological and pathological changes, and to study the regulative effects of Chinese herbs and western medicine on its activity. Porcine neutrophils were obtained from porcine whole blood that was separated to remove erythrocytes with dextran and to separate lymphocytes with Ficoll Solution, and then cleaned with specia...