The invention discloses a simple shaftless angle-free composite notching mechanism. The simple shaftless angle-free composite notching mechanism comprises a cutting motor, a first cutting guide rail,a first ball screw, a fixing block, an A-axis guide rail mounting plate, an angle-free mounting plate, a partition, a first notching mechanism and a second notching mechanism; the cutting motor, the first cutting guide rail, the first ball screw, the fixing block, the A-axis guide rail mounting plate, the angle-free mounting plate and the second notching mechanism are arranged on one side of the partition, and the first notching mechanism is arranged on the other side of the partition; a feeding assembly is arranged on the same side as the first notching mechanism of the partition; a machete assembly and a corrective assembly are correspondingly arranged at the two ends of the partition; an encoder assembly is arranged on the same side as the second notching mechanism of the partition; thesecond notching mechanism is fixedly mounted on the fixing block; the fixing block is mounted on the first ball screw; and the first ball screw is in drive linkage with the cutting motor mounted below the first ball screw. The simple shaftless angle-free composite notching mechanism has the beneficial effects that the overall structure can be simplified, the production cost is lowered, and the operation is stable and reliable.