The invention discloses an automatic filling mechanism of an industrial detergent. The automatic filling mechanism is composed of a storage tank and a console, wherein a monitor and a carrying plate are arranged at the outer part of a tank body of the storage tank; a placing box is arranged on the carrying plate; the placing box is fixed to the carrying plate through welding; a placing tube is arranged on the placing box; an electronic valve is arranged in the placing box; a flow monitor is arranged on the electronic valve; one end of the placing tube is connected to the outer part of the placing box; the other end of the placing tube is connected in the storage tank through the electronic valve; and a display and control buttons are arranged on a seat of the console. According to the automatic filling mechanism, temperature and PH value of the detergent in the storage tank can be effectively monitored through a temperature monitor and a PH monitor in the monitor, the flow monitor canmonitor the flowing speed of the detergent during discharge, timed opening and closing can be achieved on the electronic valve through control, of a controller, for the electronic valve, and the problem that monitoring time is too long due to manual whole-process monitoring is solved.