A 3 DOFs decoupling spherical parallel mechanism provided by the present disclosure comprises: a fixed platform, a rotation assembly, a moving platform, a first arc kinematic chain, a second arc kinematic chain, a first arc rod, and a second arc rod. In the 3 DOFs decoupling spherical parallel mechanism, the rotation assembly can drive the moving platform to rotate by 360 degrees around a direction being perpendicular to the fixed platform, and the first arc rod and the second arc rod reciprocate along tangential directions of the first arc kinematic chain and of the second arc kinematic chain respectively to enable the moving platform to rotate around an axis of a plane where the first arc kinematic chain or the second arc kinematic chain is located. In this way, the rotations of the moving platform in three directions are respectively driven by driving units in three directions and being independent from each other, such that the three rotation actions of the mechanism have decoupling capability.
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