The utility model discloses an integral water purification device which comprises an integral water passing structure and a base, wherein the base comprises a platform; the integral water passing structure comprises a platform lower part and at least three bayonets; the platform lower part comprises a water inlet, a water outlet and at least two single pipes which are horizontally fixedly connected in sequence and are not directly communicated with one another; the platform lower part is fixed on the lower surface of the platform; the bayonets are fixedly connected to the upper surface of the platform and are communicated with the single pipes and the like. According to the water purification device, a plurality of filter cores are fixed on the platform through the bayonets, so that the space is saved; the device is convenient to use, the filter cores can be conveniently and quickly replaced, and the problems of repair and the like of the connecting single pipes cannot be caused; the device is easy to operate and control and has a very high application prospect.