In recent years, the environmental consciousness is the major concern for lots of governments. Developing the new and safe pest control methods to replace the pesticides have been studies for many years. Sex pheromone, with high bioactive, species specificity, long potency, nontoxic, compatibility, with small amount and easy to handle, has been one of the most important issue to replace pesticides, Sex pheromones will be the key technology to the non-pesticides agriculture in the near future. This research reports a new and facile synthesize method to prepare a single and pure Z-form unsaturated double bond in the sex pheromones skeletons. This research also can be easily commercial produced and to afford the homemade pheromone in Taiwan.