The invention provides a rotational flow sand remover device with an automatic sand removing function. The rotational flow sand remover device comprises a rotational flow upper tube body and a rotational flow lower tube body which are connected through a bolt. A liquid outlet pipe is arranged on the upper portion of the rotational flow upper tube body. A liquid inlet pipe is arranged in the eccentric position of the rotational flow upper tube body. A drained sand storing device communicating with a cavity of the rotational flow lower tube body is fixedly connected with the lower end of the rotational flow lower tube body. According to the provided rotational flow sand remover device with the automatic sand removing function, sand draining is efficient and fast.