The invention discloses a primer, probe and detection method for detecting pasteurella multocida by an RAA fluorescence method. The primer and the probe are suitable for detection by the RAA fluorescence method, can accurately detect pasteurella multocida plasmids and positive samples, and do not have cross reactions with mycoplasma, streptococcus, escherichia coli, eperythrozoon, neospora caninum, toxoplasma gondii and healthy cow blood, and the specificity reaches 100%. The detection method is quick, and high flux is easy to realize, besides, the detection time is reduced, and the detectioncost is reduced. A method for quickly detecting pasteurella multocida DNA based on the RAA fluorescence method, provided by the invention, is high in sensitivity, and the reaction detection sensitivity reaches 10copies/[mu] L.