Oil field water treatment device

The invention relates to an oil field water treatment device which comprises a shell, and an oil collecting mechanism is arranged on the shell. The oil collecting mechanism comprises a rack; the rack is in transmission connection with a first transmission belt and a second transmission belt; a first flow guide groove is formed in the top of the rack, a driving roller and a driven roller are rotationally connected to the rack, a driving part is arranged at one end of the driving roller, and a first transmission wheel and a second transmission wheel are arranged on the driving roller. The oil collecting mechanism has the beneficial effects that the oil collecting mechanism is arranged, and when the oil collecting mechanism is used, liquid ascends or permeates along a gap under the infiltration condition by utilizing the infiltration phenomenon and the capillarity of the oil; and under the non-infiltration condition, the liquid descends along the gap, the oil liquid in the sedimentation tank is recycled into the