Water purification system and TDS switching method of water purification system

The invention discloses a water purification system and a TDS switching method of the water purification system. The water purification system comprises an electric purification module, the electric purification module is suitable for purifying entering water, the electric purification module is connected with a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is connected with a raw water opening, raw water of the raw water opening enters the electric purification module through the water inlet pipeline, and a water storage tank for storing fresh water is arranged on the water outlet pipeline; fresh water with the target TDS value is obtained by taking water from the water storage tank. According to the water purification system, by arranging the water storage tank, water can be taken immediately after the water outlet TDS value is switched, a user does not need to wait, and therefore the user experience feeling when drinking water with different water outlet TDS values is switched