An ancient Banjing-river ship was excavated in an offshore river channel in Taicang. In the early stages of conservation and restoration work, it is necessary to desalinate the object. In order to understand the salt content of the ship’s wood, the kind and content of salts in samples from different parts and of different tree species were analyzed. The results show that the soluble salts of C1- and SO2-₄ were in the samples. By ultrasonic-assisted heating and deionized water immersion for 20 days, the Cl- content could be controlled within 1 mg/L; after 100 days, the SO2-₄ content was within 1 mg/L. The results of this study may provide favorable conditions for further preservation.