The invention discloses an omnidirectional-support variable fulcrum lever system, and relates to a continuously variable geometric parameter technique in the field of machinery. The continuously variable geometric parameter technique can be used for variable lever ratio required applications in the field of machinery, such as the technical field of fully variable valve timing of internal combustion engines. Traditionally, a lever fulcrum fails in omnidirectional support during continuous varying, so that application of the variable fulcrum lever technique is limited. By fulcrum splitting technology, each lever is provided with two fulcrums, each fulcrum provides one-degree-of-freedom support, supporting directions of the two fulcrums are perpendicularly orthogonal approximately, one fulcrum is fixed on the lever, and the other fulcrum can be moved on demand to change the position of the lever fulcrum under control of a control mechanism. The omnidirectional-support variable fulcrum lever system comprises ten connecting bars, six crossing connecting bars and double four-bar links. The omnidirectional-support variable fulcrum lever system allows for approximate omnidirectional support of the variable fulcrums of the levers, and allows for controllably variable position of the fulcrums.