Method for aiding the landing of an aircraft in a landing runway approach phase, comprising the following steps: - a step of computation, implemented by a computational module, consisting in computing by extrapolation a trajectory of the aircraft on the basis of a current position of the aircraft, - a first step of determination, implemented by a first determination module, consisting in determining whether the extrapolated trajectory of the aircraft cuts the ground ahead of a threshold of the landing runway; - a step of measurement, implemented by a measuring module, consisting in measuring a current height of the aircraft above an overflown terrain, - a second step of determination, implemented by a second determination module, consisting in determining whether the current height corresponds to a height considered to be a risk height, characterized in that the second determination step consists in comparing the current height of the aircraft with a predetermined threshold height, the current height being considered to be a risk height if the said current height is less than the predetermined threshold height, the threshold height being equal to the difference between, on the one hand, a first height corresponding to a nominal height included in a nominal approach trajectory at a current distance of the aircraft with respect to the threshold of the landing runway and, on the other hand, a second height corresponding to a height included in a predetermined surface vertically in line with the current position of the aircraft, the predetermined surface corresponding to: - a surface establishing height limits around the landing runway, or - a surface establishing height limits around the landing runway to within a margin, - a step of alert, implemented by an alert module, consisting in generating an alert intended for a crew of the aircraft only if the following two conditions are simultaneously fulfilled: ∘ the two determinations of the two determination steps (E2, E4) are positive, and ∘ the aircraft is situated at a distance with respect to the threshold of the landing runway which is less than a predetermined threshold distance. - a step of computation, implemented by a computational module, consisting in computing by extrapolation a trajectory of the aircraft on the basis of a current position of the aircraft, - a first step of determination, implemented by a first determination module, consisting in determining whether the extrapolated trajectory of the aircraft cuts the ground ahead of a threshold of the landing runway; - a step of measurement, implemented by a measuring module, consisting in measuring a current height of the aircraft above an overflown terrain, - a second step of determination, implemented by a second determination module, consisting in determining whether the current height corresponds to a height considered to be a risk height, - a surface establishing height limits around the landing runway, or - a surface establishing height limits around the landing runway to within a margin, - a step of alert, implemented by an alert module, consisting in generating an alert intended for a crew of the aircraft only if the following two conditions are simultaneously fulfilled: ∘ the two determinations of the two determination steps (E2, E4) are positive, and ∘ the aircraft is situated at a distance with respect to the threshold of the landing runway which is less than a predetermined threshold distance. - a step of alert, implemented by an alert module, consisting in generating an alert intended for a crew of the aircraft only if the following two conditions are simultaneously fulfilled: ∘ the two determinations of the two determination steps (E2, E4) are positive, and ∘ the aircraft is situated at a distance with respect to the threshold of the landing runway which is less than a predetermined threshold distance. ∘ the two determinations of the two determination steps (E2, E4) are positive, and ∘ the aircraft is situated at a distance with respect to the threshold of the landing runway which is less than a predetermined threshold distance.