Provided are a fetal electrocardiosignal separation method and a device. The fetal electrocardiosignal separation method comprises: detecting QRS complex on a received maternal abdominal wall electrocardiosignal to determine a starting position of the QRS complex and a starting position between QRS complexes (S101) smooth processing a signal segment between the QRS complexes using a smooth window (S102) linear averaging the QRS complex to generate an average template (S103) according to correlation between the maternal QRS complex in the average template and maternal QRS complex corresponding to the current electrocardiocycle, correcting the dynamic amplitude of the maternal QRS complex in the average template to generate a maternal abdominal wall electrocardio estimation signal (S104) taking the maternal abdominal wall electrocardio estimation signal as a reference signal, and the maternal abdominal wall electrocardiosignal as a desired signal, separating the fetal electrocardiosignal from the maternal abdominal wall electrocardiosignal by means of adaptive algorithm (S105). The fetal electrocardiosignal separation method and the device involve a simple fetal electrocardiosignal separation algorithm, in which only one stream of maternal abdominal wall electrocardiosignal is needed, such that single lead fetal electrocardiosignal separation can be achieved.Linvention concerne un procédé dextraction dun signal dun électrocardiogramme fœtal et dispositif associé. Le procédé dextraction dun signal dun électrocardiogramme fœtal consiste à : déterminer lemplacement de départ du groupe dondes QRS et lemplacement de départ entre le groupe dondes QRS du signal en provenance pour détecter le groupe dondes QRS du signal en provenance dun électrocardiogramme de labdomen de la mère (S101) traiter le signal venant entre le groupe dondes QRS au moyen de fenêtres dynamiques (S102) obtenir un modèle linéaire du groupe dondes QRS (S103) obtenir un signal destimation de lélectrocardi
