The static balancing of a spatial 6-degree-of-freedom (6-DoF) decoupling parallel mechanism is discussed in this paper. Two traditionalapproaches (using counterweights and the springs) are used to statically balance the mechanism. Due to the existence of theirshortcomings, a hybrid approach is proposed based on the static balancing of the mechanism. The main feature of this mechanism is thatthe 3-DoF rotating part can be static balancing itself, which means that its mass has no effect on the gravity balancing of the system, forany configuration of the mechanism, so the rotating part can be considered as a whole and the calculation is simplified. Finally, examplesand dynamic analysis corresponding to the three balancing methods are given to illustrate the results.