The invention relates to the technical field of forest tree propagation, and in particular relates to a himalayan cypress germination accelerating composite and a preparation thereof and a seed sowing and seedling growing method of himalayan cypress. The himalayan cypress germination accelerating composite comprises IAA (Indole Acetic Acid), 6-BA (benayl aminopurine) and sodium nitroprusside. With the adoption of the himalayan cypress germination accelerating composite, the germination rate of himalayan cypress seeds can be obviously increased. According to the seed sowing and seedling growing method, the seed sowing and seedling growing are artificially performed through a greenhouse in a fine manner, so that a series of problems in a traditional seedling growing method can be overcome; the seedling rate is more than 85%; the uniformity is high; in addition, the seedlings grow well; the method has the characteristics that the seedling can grow quickly, the growing period is short, and the operation is simple; the problems in the himalayan cypress seed sowing and seedling growing process, such as low germination percentage of seeds, low seedling rate, weak seedlings, and seed sowing and seedling growing in spring, can be solved.