The invention relates to the technical field of linear drainage ditch, in particular to an anti-blocking linear drainage ditch which comprises a lifting basket and a ditch. A drainage opening is formed above the ditch. The two sides of the lifting basket are connected with the ditch. A straight rod parallel to the drainage opening and a vertical rod perpendicular to the drainage opening are arranged at the drainage opening. A water inlet is formed in the joint of the lifting basket and the ditch. A first filter net and a second filter net are arranged inside the lifting basket. The second filter net comprises an arc portion and a linear portion. A plurality of conical holes are formed in the arc portion. A plurality of through holes are formed in the linear portion. A circle of handrails are arranged on the sides, facing the circle center of the arc portion, of the through holes, the bottoms of the handrails are closed, and floating balls are placed into the handrails. Rainwater flows through the lifting basket through the ditch, sundries inside the rainwater are further filtered through the lifting basket, the sundries are collected inside the lifting basket, only the lifting basket is treated within each maintenance or cleaning period, maintenance workloads are reduced, meanwhile, the sundries are collected together by the lifting basket and cleaned away, and blocking of the linear drainage ditch is avoided.