Abstract: Provided is a seat organizer bracket for a vehicle, including: a storage box for supporting a tablet and storing items, and a connection cup holder for connecting a seat of the vehicle; wherein the connection cup holder is detachably connected to the storage box; the storage box includes a container body and a lid; an end of the lid is hingedly connected to the container body through a lid bearing; a hidden tensile clamp arm structure is arranged in the lid for clamping the tablet; a bottom bracket is arranged on a lower end of the lid for supporting the tablet; the connection cup holder is arranged with an extension arm, and the extension arm 24 is adjustable to lock the connection cup holder into a saucer with different sizes of the seat.