1. A body relationship estimation method, comprising: obtaining a target picture; calculating a first body relationship feature of two persons according to at least one of first location information of a body part of each person of the two persons in the target picture or second location information of body parts of the two persons, wherein the first location information is obtained by performing single-person gesture estimation on each person and the second location information is obtained by performing two-person joint gesture estimation on the two persons when the first location information indicates that the body parts of the two persons overlap; and determining a body relationship between the two persons according to the first body relationship feature.