Lane change decision-making method and device and storage medium

The invention discloses a lane changing decision method and device and a storage medium, and relates to the technical field of automatic driving. The method can be applied to the fields of intelligent automobiles, new energy automobiles and the like, and comprises: on a first lane on which a target vehicle is located, when a first obstacle exists in front of the target vehicle, acquiring longitudinal driving information of the target vehicle (201); lane changing is carried out under the condition that the longitudinal driving information meets preset lane changing conditions, the preset lane changing conditions include that the first relative speed is smaller than zero and the second relative speed is smaller than zero, and the first relative speed is the relative speed between the first speed and a set first expected speed; the second relative speed is a relative speed (202) between the first speed and the second desired speed. According to the method, the intelligent automobile can fully and intuitively ref