Filtering device for dissolved organic matters in salt tide water body

The invention relates to the technical field of filtration of soluble organic matters, in particular to a salt tide water soluble organic matter filtering device which comprises an ultrafiltration shell, a filter element, a raw water pipe, a concentrated water pipe, a permeation pipe, a working barrel and a control system, the ultrafiltration shell is mounted in the working barrel, and a water inlet and a water outlet are formed in the side wall of the working barrel; a water producing port is formed in the bottom of the working barrel, the filter element is mounted in the ultrafiltration shell, the raw water pipe is mounted on the side wall of the ultrafiltration shell, and the water inlet is communicated with the raw water pipe. The working barrel of the switching device is divided into the working area and the cleaning area, so that the whole ultrafiltration device can still work continuously in the cleaning process of the filter element, meanwhile, ultrasonic water adding is used for cooperating with the