Sediments entering into the sea was calculated according to the analysis of the sediment concentration and sediment discharge at the hydrometry stations of the rivers in the Jiaozhou Bay, and the sediment discharge of the rivers was analyzed. The results show: (1) The sediment discharge of the rivers are mainly from the northwest and northeast of the Jiaozhou Bay; (2) The rivers belong to medium sand, and the sediment concentration and sediment discharge modulus of the upstream are more than those of the downstream; (3) The annual variation of sediment discharge is large and the maximum is 518.7 times of the minimum, the runoff entering into the sea and the sediment discharge become larger with the rainfall increasing; (4) The particle size of the sediments becomes smaller when it transports from the headstream to the estuary.