An automatic putting type rice and water separator is a kitchen utensil which can enhance practicality of a time-presetting function of a kitchen appliance, and solves the problem that time presetting congee cooking can not be achieved due to long-time soak of rice in a kitchen. According to the automatic putting type rice and water separator, a structure that three foldable supports are connected with a circular tray in whole is adopted, the tray bottom is movable and is fixed through a fixing rod at the bottom of the rotating tray, cleaned rice is put into the tray, the tray and the rice are together put into a kitchen electric rice cooker with the time-presetting function and filled with water, and time-presetting congee cooking operation is conducted according to the normal workflow. In the preset time count down stage, the rice and the water are always in a separation state, long-time soak of the rice is avoided, when the preset time is up, the movable bottom opens automatically with rising of the temperature in the cooker, the operation of putting the rice into the water is finished, then the rice and the water are mixed, the whole putting process is finished automatically and independently in good time in the whole putting process, and the time-presetting congee cooking is finished normally as the electric rice cooker continues to work normally. The automatic putting type rice and water separator is made of food-grade stainless steel in whole, and is of a pure mechanical structure, free of potential safety risks, simple in operation and reliable in operation.