The No.6 and 7 bulkheads and the keel of the No.8 bulkhead, as well as silt under the shipboard of an ancient ship found in the Banjing River were collected in order to desalt them for conservation purposes.The concentrations of major elements and ions were measured. The change of electrical conductivity during the desalting process was measured with an electrical conductivity meter. Results showed that concentration of major ions in the wood and silt was higher than that of control samples. The ions are mainly soluble salts. The degree of corrosion of the wood was positively correlated with content of ions inside:the higher content of the ions, the more corrosion . After desalting of the samples, electrical conductivity in the desalted solution was seen to decrease. Such testing results could provide certain guidance to future desalting of ancient ships.