Sealed connection user salvage method based on big data accurate positioning

The invention discloses a closely connected user salvage method based on big data precise positioning, and belongs to the technical field of epidemic prevention and control, and the method comprises the steps: positioning a diagnosed user according to the collected XDR data and MR data of the diagnosed user, and obtaining a target position track of the diagnosed user in a preset time period; and analyzing the target position track to obtain a motion state of the diagnosed user in the preset time period, obtaining a target motion scene corresponding to the target position track according to the motion state of the diagnosed user, and checking the closely connected user from the target motion scene, that is, the motion track of the diagnosed user is rapidly positioned, so that the accuracy of the diagnosed user is improved. And the motion scenes corresponding to different motion states of the diagnosed user can be quickly locked, so that the closely connected user can be quickly and accurately checked. Therefor