Provided are a fetal-electrocardiogram separation method and device. The fetal-electrocardiogram separation method comprises: using an R-wave crest position of a received maternal abdominal electrocardiogram signal as a center positioning point, capturing an electrocardiogram signal segment having a specific length (S101) performing linear weighted averaging of the electrocardiogram signal segment corresponding to the current electrocardiogram period and the preceding M-1 consecutive electrocardiogram signal segments to generate a recursion template (S102) according to the correlation between the maternal QRS complex in the recursion template and the maternal QRS complex corresponding to the current electrocardiogram period, performing dynamic amplitude correction of the magnitude QRS complex in the recursion template to generate a maternal abdominal electrocardiogram estimation signal (S103) taking the maternal abdominal electrocardiogram estimation signal as a reference signal and taking the maternal abdominal electrocardiogram signal as a desired signal, separating, by means of an adaptive algorithm, a fetal electrocardiogram signal from the maternal abdominal electrocardiogram signal (S104). The algorithm of the fetal-electrocardiogram separation method and device is simple, and only one maternal abdominal electrocardiogram signal is needed to separate a single-lead fetal electrocardiogram signal.Linvention concerne un procédé dextraction dun signal dun électrocardiogramme fœtal et dispositif associé. Le procédé dextraction dun signal dun électrocardiogramme fœtal consiste à : intercepter le segment dun signal dun électrocardiogramme à longueur donde déterminée avec un point culminant de londe R tenant lieu de point de détermination central se trouvant dans le signal reçu en provenance dun électrocardiogramme de labdomen de la mère (S101) produire un modèle moyen linéaire avec segment dun signal dun électrocardiogramme correspondant au cycle de lélectrocardiogra
