The invention discloses a promoter for generation of gas hydrates, and a preparation method and application thereof. The promoter for generation of gas hydrates is a dry powdery solution formed after high speed shearing and dispersion of a surfactant solution and strong hydrophobic solid particles in a high intensity stirrer, wherein the surfactant solution is an aqueous solution of one or more anionic surfactants, cationic surfactants or nonionic surfactants, and the strong hydrophobic solid particles are one or more selected from the hydrophobically modified particles consisting of silica, titanium dioxide, titanium sesquioxide, alumina, zinc oxide, calcium carbonate, montmorillonite, diatomite, fly ash, zeolite, talcum and mica particles, etc. The promoter provided by the invention is highly dispersed solution microdroplets and has a great gas-liquid contact area, the dispersed microdroplets contain surfactants, which enables gas-liquid contact during growth process of hydrates to be further reinforced, and therefore, a generation rate of gas hydrates and gas storage amount in a static system are substantially improved; meanwhile, the promoter has the advantages of low cost, no pollution and convenient preparation and usage.