The invention provides a positioning assisting data configuration method and a positioning assisting data configuration device for user equipment. The method comprises the following steps that: an evolved serving mobile location center (E-SMLC) acquires positioning assisting information from an evolved node B (eNB) through an S1 interface message and an SLs interface message; and the E-SMLC transmits the positioning assisting information serving as one of positioning assisting data to the user equipment (UE) for positioning. The embodiment of the invention discloses a positioning assisting data configuration flow in a long time evolution (LTE) system so as to supplement the conventional positioning framework flow.