The invention discloses a cap of spray mineral water bottle, including cap body, spray means and water locking means. This cap of spray mineral water is used with resilient mineral water bottle body to form a multifunctional spray mineral water bottle, which can ensure normal drinking of mineral water as well as carry out spray drinking of water by means of squeezing the bottle body to transform bottle body and increase the pressure inside the bottle, thus making water to enter inlet from the outlet of water locking means on the cap, and to enter the atomizing channel through the water channel, finally to be sprayed from the spray aperture. Furthermore, in the open air or in the dusty and hot environment, you can place the mineral water bottle upside down, put the nozzle to face your body or surrounding, and squeeze the bottle body to spray, thus reducing surrounding temperature, as well as subsiding dust by combining dust and spray to make you feel cool, fresh and comfortable.