The invention discloses a conformal array testing method for time-sharing data synthesis. The method comprises the following steps that: all ports of all individual units and a multi-channel switch inan antenna are numbered; inconsistency of all switch cable links is tested and inconsistency test data are stored; the ports are connected with the corresponding numbers of individual units by the cables, a plane near-field test parameter is set and a near-field acquisition plane is determined; the antenna is fixed and all ports are opened one by one, unit plane near-field data are collected until all unit plane near-field data are collected based on the corresponding relationship; inconsistency removing is carried out on the unit plane near-field data; phase weighted synthesis is carried outon the unit plane near-field data to obtain plane near-field data of the antenna; and near-far field conversion is carried out to obtain an antenna directional diagram. Therefore, the directional diagram, at any wave position, of the antenna can be obtained and the antenna testing capability under the existing resource configuration is enhanced substantially.