The invention relates to a plate-type satellite structure for parallel launching of a rocket and multiple satellites and an assembling method. The plate-type satellite structure for parallel launchingof the rocket and the multiple satellites comprises a satellite main structure and a separation structure assembly. The interior of the satellite main structure is used for fixing satellite load equipment and satellite platform equipment, and the outer wall of the satellite main structure is used for fixing a satellite antenna and a solar wing. The separation structure assembly is used for reinforcing the satellite main structure and fixing the satellite main structure to the outer side of a satellite distributor, the satellites can be separated from a carrier rocket independently or the satellites can be separated from the carrier rocket simultaneously through the satellite distributor, the space in the height direction of a fairing is fully utilized, the manufacturing cost is low, the manufacturing period is short, and the assembling is simple and convenient.