Abstract: The surface sediment along the coast of Bailong Peninsula was investigated in 2016， and the radionuclide activities were measured using HPGeγ ray detector. The activities of⁴⁰K、²¹⁰Pb、²²⁶Ra、²²⁸Th、²²⁸Ra、²³⁸U and ¹³⁷Cs were 354±125， 89.2±41.2， 32.40±9.38， 49.2±14.7， 42.8±12.6， 48.3±20.2 and 0.74±0.33 Bq/kg， respectively. The activities of ²³⁸U，²³²Th and ²²⁶Ra were comparable with the sediments activities of other coast in China， while ⁴⁰K and ¹³⁷Cs activities were slightly lower. The average absorbed gamma dose rate （D） and annual effective dose equivalent （AEDE） calculated according to the activities were comparable with the world average， and average radium equivalent activity （Ra_eq） was lower than the recommended limit value.