The invention discloses a rotary type multi-arm shedding mechanism, belonging to the technical field of textile machinery. The rotary type multi-arm-shedding mechanism comprises a main shaft, swing arms, eccentric discs, a spline disc, clutch claws arranged on the eccentric discs, a first signal swing arm, a second swing arm and an iron-absorbing swing arm, wherein one end of the first signal swing arm is composed of a first swing arm meshing face, and the other end of the first signal swing arm is composed of a first iron-absorbing swing arm contact pin; one end of the second signal swing arm is composed of a second swing arm meshing face, and the other end of the second signal swing arm is composed of a second iron-absorbing contact pin; and the iron-absorbing swing arm is arranged on an iron-absorbing swing arm shaft. The rotary type multi-arm-shedding mechanism is characterized in that the meshing face of the firs eccentric disc and the second eccentric disc are of the shape of a semi-circular-arc concave face, the meshing face of the first swing arm and the meshing face of the second swing arm are of the shape of a semi-circular-arc concave face, the radius of the semi-circular-arc concave face is identical to that of the semi-circular-arc concave face, in addition, a first distance from the meshing face of the first eccentric disc to the rotation axis of a main shaft is identical to a second distance from the meshing face of the second eccentric disc to the rotation axis of the main shaft. The rotary type multi-arm-shedding mechanism has the advantages of contributing to guaranteeing a shedding action effect and saving energy and ensuring the quality of textiles.