The invention discloses a flowerpot capable of achieving automatic watering and preventing a theft. The flowerpot comprises an upper pot body, a lower pot body, a support for containing the pot bodies, a water tank and micro holes, a partition plate is arranged between the upper pot body and the lower pot body and provided with multiple water permeable holes, a drainage hose is arranged at the bottom of the lower pot body, threaded holes are formed in the side wall of the lower pot body, the support is provided with threaded holes matched with the lower pot body, the lower pot body is fixedly connected with the support through threads, and installing stand columns are arranged on the lower portion of the support; the outer side of the upper pot body is connected with the water tank, the micro holes are formed in the joints, and watering is conducted on the flowerpot according to the principle of a communicating vessel. According to the flowerpot capable of achieving automatic watering and preventing the theft, watering and draining are both very convenient, the water quantity of the flowerpot can be observed in time, a water conservation function is achieved, the water source is saved, not only can the flowerpot placed outside be prevented from being stolen, but also the installation range is wider, and the flowerpot can be installed at some places which are inconvenient for installation.