System specially used for reverse osmosis membrane testing

The invention discloses a system specially used for reverse osmosis membrane testing. The system comprises a salt-dissolving seawater tank, a salt-dissolving brackish water tank, an 8-inch membrane shell and a 4-inch membrane shell; an outlet of the salt-dissolving seawater tank is connected with a raw water booster pump, an outlet of the raw water booster pump is respectively connected with an inlet of the salt-dissolving seawater tank and security filters, two security filters are continuously arranged, and a pipeline between the security filters and the raw water booster pump is provided with a pressure gauge and a thermometer; and a conductivity meter and a low-pressure protection switch are arranged between the security filters and a high-pressure pump, one branch pipeline of the high-pressure flushing pump is connected to an inlet of the salt-dissolving brackish water tank, and the other branch pipeline of the high-pressure flushing pump is connected with the 8-inch membrane shell and the 4-inch membran