Abstract: 1321 individual Tamarix chinensis were selected to determine the height, branch numbers, and the basal diameter in Changyi marine ecological protection area of Shandong province, Morever, 36 Tamarix chinensis were harvested to estimate the biomass. When combined the biomass data and growth data together, biomass estimating medels was established for stem, branch, leaves, root respectively. The aboveground, belowground, and total biomass estimating models were also established. Based on the models mentioned above, the total biomass of present research area was 14.060 t/hm².In the aboveground biomass, the stem biomass >the branch biomass >the leaves biomass.