The invention relates to a novel SF6 gas splitter which is characterized in that the novel SF6 gas splitter comprises a sixth three-way valve and a first four-way valve, a first outlet of the sixth three-way valve is communicated with a first inlet of the first four-way valve, a first inlet of the sixth three-way valve is communicated with a gas inlet connector after sequentially passing through a first check valve, a first pressure meter and a first three-way valve, and a second inlet of the sixth three-way valve is communicated with a gas bottle connector after sequentially passing through a second check valve, a second pressure meter and a second three-way valve; a first outlet of the first four-way valve is communicated with a first instrument connector after sequentially passing through a third check valve, a third three-way valve and a third pressure meter, and a second outlet of the first four-way valve is communicated with a second instrument connector after sequentially passing through a fourth check valve, a fourth three-way valve and a fourth pressure meter. The novel SF6 gas splitter can achieve brackish water, purity and a product decomposing test at the same time and can flexible achieve the purpose that three instruments conduct the comparison test at the same time.