Update information. Bovine Pasteurella multocida (P. multocida) serotype A is considered to be one of the major causes of bovine respiratory disease (BRD), while its secretory proteins remain poorly understood. In this study, we employed data-independent acquisition (DIA) LC-MS/MS combined with bioinformatics analysis to obtain more comprehensive and accurate information on proteins secreted by P. multocida. A total of 154 proteins were obtained from the supernatants of two isolates of bovine P. multocida serotype A (high virulent PmCQ2 and low virulent PmCQ6) cultured in Martin or BHI media，and 52 putative secretory proteins were identified.