SSZ-39 molecular sieve, preparation method thereof and DeNOx reaction catalyst

The invention provides an SSZ-39 molecular sieve, a preparation method thereof and a DeNOx reaction catalyst. The preparation method comprises the following steps: mixing a silicon source, an aluminum source, an alkali source, a first organic template agent, a second organic template agent and water, and aging to obtain gel; the gel is stirred, crystallized and roasted, and the SSZ-39 molecular sieve is obtained. Wherein the first organic template agent comprises a piperidine derivative template agent and/or a phosphine derivative template agent; the second organic template agent comprises an aliphatic amine template agent. The invention also provides the SSZ-39 molecular sieve obtained by the preparation method and a DeNOx reaction catalyst comprising the SSZ-39 molecular sieve. According to the invention, the cheap fatty amine template agent is used for replacing part of piperidine and phosphine organic template agents, so that the synthesis cost of the SSZ-39 molecular sieve can be obviously reduced, and m