The invention provides a battery pack fixing support for an electric automobile. The battery pack fixing support comprises a base plate, a fixed vertical plate and a movable vertical plate, wherein the fixed vertical plate and the movable vertical plate are arranged at two sides of the upper surface of the base plate in parallel side by side, and the lower end of the fixed vertical plate is fixedly connected with the upper surface of the base plate; one end of each guide screw is fixedly connected with the lower end of the fixed vertical plate; the other end of each guide screw penetrates through the movable vertical plate and is in threaded connection with a nut; one end of each locking screw is rotationally connected with the upper end of the fixed vertical plate through a rotating shaft; the other end of each locking screw is clamped in a gap corresponding to the upper end of the movable vertical plate; the nuts respectively sleeve two ends of the locking screws; two T-shaped sliding chutes are formed in the upper surface of the base plate; two T-shaped sliding blocks matched with the corresponding T-shaped sliding chutes are arranged at the lower end of the movable plate side by side. The battery pack fixing support disclosed by the invention has the beneficial effects that the structure is simple; in addition, impact and vibration borne by battery packs can be buffered, the battery packs are prevented from being damaged, and the service life of the battery packs is prolonged; good ventilation among the battery packs can be guaranteed, and the damage to the battery packs due to overheat is avoided.