The present invention relates to a chemical and pharmaceutical technology, and in particular to a STAT3 and ERK signal pathway inhibitor and a use thereof. On the one hand, provided is a STAT3 and ERK signal pathway inhibitor. The inhibitor mainly consists of a mogroside and/or an analogue thereof. The mogroside and the analogue thereof inhibit the phosphorylation of a transcription factor STAT3 and inhibit the phosphorylation of an ERK. In the method for preparing the mogroside and the analogue thereof, a high-purity target product is prepared by means of the steps of pretreatment, resin separation, hydrolysis, chromatographic purification, etc., the process has the characteristics of simpleness and strong operability, and the purity of the product is greater than 96%. On the other hand, provided is a use of the STAT3 and ERK signal pathway inhibitor in the preparation of drugs for treating tumours, which effectively induces the cyclic arrest of cancer cells and promotes the apoptosis of cancer cells, realizes the purposes of inhibiting the proliferation of cancer cells and promoting the apoptosis of cancer cells, and has a very good inhibition effect on cancers.La présente invention concerne une technologie chimique et pharmaceutique et, en particulier, un inhibiteur des voies de signalisation STAT3 et ERK et son utilisation. Dune part, linvention concerne un inhibiteur des voies de signalisation STAT3 et ERK. Linhibiteur est constitué principalement dun mogroside et/ou dun analogue de celui-ci. Le mogroside et lanalogue de celui-ci inhibent la phosphorylation du facteur de transcription STAT3 et inhibent la phosphorylation de ERK. Dans le procédé de préparation du mogroside et de lanalogue de celui-ci, un produit cible de pureté élevée est préparé au moyen des étapes de prétraitement, de séparation sur résine, dhydrolyse, de purification par chromatographie, etc., le procédé étant caractérisé par sa simplicité et sa grande facilité dutilisation, et la pureté du p
