The present invention discloses peptide compounds, applications thereof, and compositions containing the same. The present invention provides a peptide-based compound represented by the formula I, a pharmaceutically acceptable salt thereof, a tautomer thereof, a solvate thereof, a crystalline form thereof or a prodrug thereof. The compound has good stability and good activity. XX0-XX1-XX2-XX3-XX4-XX5-XX6-XX7-XX8-XX9-XX10-P (I)本発明は、ペプチド系化合物、その応用及びそれを含む組成物を開示する。本発明は式Iで表されるペプチド系化合物、その薬学的に許容される塩、その互変異性体、その溶媒和物、その結晶形又はそのプロドラッグを提供する。当該化合物は、安定性がよく、且つ活性がよい。 XX0-XX1-XX2-XX3-XX4-XX5-XX6-XX7-XX8-XX9-XX10-P (I)