The utility model relates to a material preparation field particularly, relates to a continuous coprecipitation synthesizer and system. The device includes raw materials pre -prepared device, reationkettle, material dropwise add device, takes out worry device, washing device, vacuum pumping system and drying device. Disposing the raw materials in advance, carrying to the reation kettle in again,heat transfer device can provide suitable reaction temperature for the reaction. Material dropwise add device can be at dropwise add material in to reation kettle of suitable time. Take out and consider the device and can take out to consider to the reactant in the reation kettle after the reaction and handle, and then obtain the reactant that needs. Washing device washs the back to this reactant,and drying device and vacuum pumping system mutually support, dries under the vacuum environment to the reactant to can obtain the reactant of needs. Continuous production can be realized to this continuous coprecipitation synthesizer, each condition control of reaction is accurate, guaranteed product property that the preparation obtained can the reliability.