System special for testing reverse osmosis membrane

The utility model discloses a system special for testing a reverse osmosis membrane. The device 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 the security filter; two security filters are continuously arranged; a pressure gauge and a thermometer are arranged on a pipeline between the security filter and the raw water booster pump; wherein a conductivity meter and a low-pressure protection switch are arranged between the security filter and the 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 an 8-inch membrane shell and a 4-inch membrane