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Highly efficient synthesis of zeolites is an important goal given the many catalytic applications of zeolites in industrial chemical processes. The conventional zeolite syntheses, i.e., hydrothermal synthesis in a batch setup are usually challenged by certain limiting factors deriving from the long synthesis period or the low yield. Herein, we report that a combined strategy of organic promoter and zeolite seeding can remarkably improve the synthetic efficiency of high silica SSZ-13 zeolite. The low-cost promoter diethylamine (DEA) and zeolite seeds could both remarkably accelerate the crystallization rate of SSZ-13 zeolite, and DEA has a much higher beneficial effect on the solid yield as compared to the zeolite seeds. Consequently, the crystallization time could be unprecedentedly shorted by a factor of 30, instead of multiple days normally required. Besides, this novel protocol also exhibits high atom efficiency (93% of yield). The resultant high-silica nano-sized SSZ-13 zeolite shows good (hydro)thermal stability along with excellent catalytic performance for the MTO reaction. [Display omitted] • Synthetic efficiency of high-silica SSZ-13 zeolite was remarkably improved. • Cost-effective promoter and zeolite seeds were used in the synthesis gel. • Fast-synthesized SSZ-13 zeolite exhibits high crystallinity, high yield, small grain, and high stability. • Good performance in the MTO reaction; improved selectivity of light olefins. • Novel approach could be applied to the fast synthesis of other zeolite topologies. [ABSTRACT FROM AUTHOR]