The invention belongs to the technical field of an ad-hoc network in the field of communication and discloses a broadband ad-hoc network time slot resource dynamic allocation method based on a multilevel frame structure. The method comprises the steps that A1, a TDMA star network which takes a master node as a center is established; A2, the master node establishes a three-level frame structure andsends broadcast information to sub-nodes; A3, the sub-nodes receive the broadcast information and then enter silent receiving states until the sub-nodes have to-be-sent business; A4, the sub-nodes send time slot request frames to the master node; A5, the master node receives the time slot request frames sent by the sub-nodes and allocates time slots to new requests of the sub-nodes through utilization of an online time slot allocation mechanism; A6, the master node broadcasts a time slot allocation scheme in a next superframe; and A7, the sub-nodes receive and analyze the time slot allocationscheme. The method provided by the invention is characterized by high whole network resource utilization rate and low online operation complexity and is particularly applicable to a broadband ad-hocnetwork application with a high QoS demand.