The invention discloses a salt spray test device capable of performing feeding automatically for detecting a wall washer light. The device comprises a base,a salt spray test tank,a brine tank,a booster support,a solution storage vat,a main pipe,a branch pipe,a solenoid valve and a main control device; a control panel is arranged on the brine tank,a reagent inlet is formed in the brine tank,a solution open pore is formed in the lower end of the side face of the solution storage vat and passes through the branch pipe and the main pipe in sequence to be communicated with the reagent inlet,and thesolenoid valve is installed on the branch pipe. According to the device,a switch of the solenoid valve can be controlled through the control panel,the test solution stored in the solution storage vatpasses through the solution open pore,the branch pipe,the main pipe and the reagent inlet in sequence to be injected into the brine tank,automatic injection of the test solution is achieved,on one hand,operation is easy,and on the other hand,the test solution cannot be spilled out; user experience is enhanced.