The invention provides an integrated well cleaning and sand controlling technology string, comprising an upper
ball valve and a suspending mechanism, a lower adapter, a collar, a sand-controlling screen, a flushing
pipe, a centralizer, a connecting sleeve, a sealing body, a seal plug, a well cleaning valve and a plug, the upper
ball valve comprises a valve body as well as the upper valve ball, a hole ball board, an upper spring and a plug arranged in the valve body, the well cleaning valve comprises a well cleaning valve body and a lower spring, a spring seat and a lower valve ball arranged in the well valve body, the upper valve ball and the suspending mechanism are connected with the lower adapter, the collar, the sand-controlling screen, the connecting sleeve, the well cleaning valve body and the plug below in sequence outwards, and are connected with the flushing
pipe, the centralizer and the sealing plug of the well cleaning valve in sequence inwards; the sealing body is arranged between the seal plug and the well cleaning valve body; the lower valve ball, the lower spring and the spring seat are arranged under the sealing
plug in sequence. The technology string has double functions of sand controlling and well cleaning, can be widely applied in sand-controlling technology of oil exploitation.