The utility model discloses a river levee body landfill device suitable for river branch polluted bottom mud, which comprises a plurality of deep V-shaped support systems, an anti-seepage system is arranged on the inner surface of each deep V-shaped support system, a guide and discharge system is arranged at the V-shaped bottom, and an inverted filter system is arranged above the guide and discharge system; polluted bottom mud is placed in a V-shaped groove of the deep V-shaped supporting system, percolate generated by the polluted bottom mud is discharged into the percolate collecting pool through the guiding and discharging system, and the covering system is arranged above the deep V-shaped supporting system. According to the utility model, the normal function of the river levee is not influenced; according to the river levee, the disposal space of the river levee is utilized, the deep V-shaped structure is arranged in the levee body, a multi-barrier system with the safety protectionfunction is arranged, the problems of sediment pollution remediation and disposal sites are solved, the river levee is reinforced, pollution remediation, water conservancy remediation and ecologicalenvironment treatment are completed in one step, and the river levee is economical and practical.