The invention discloses a kit for detecting clinically common pathogenic bacteria by adopting an RNA isothermal amplification melting curve method and applications of the kit, belonging to the technical field of biological detection. The kit can detect the 16S rRNA of the following 16 clinically common pathogenic bacteria: staphylococcus aureus, pseudomonas aeruginosa, klebsiella pneumoniae, escherichia coli, proteus mirabilis, enterobacter aerogenes, pseudomonas fluorescens, acinetobacter baumannii, salmonella typhimurium, enterobacter cloacae, enterococcus faecium, enterococcus faecalis, bacillus proteus vulgaris, staphylococcus epidermidis, onion klebsiella and stenotrophomonas maltophilia. The kit has the features of high specificity, high sensitivity, low pollution, and detection accuracy and rapidness, plays an important role in clinical rapid identification and detection analysis of microbes, and has the wide application prospect.