Headspace sample injection bottle for photolysis reaction research and use method of headspace sample injection bottle

The invention relates to a headspace sample injection bottle for photolysis reaction research and a using method, the headspace sample injection bottle comprises a headspace bottle and an elastic metal sheet bracket capable of entering and exiting from the headspace bottle, the headspace bottle comprises a headspace bottle cap and a headspace bottle body, the elastic metal sheet bracket comprises a metal sheet and metal support legs, and the metal sheet is arranged on the elastic metal sheet bracket. The metal sheet is used for lifting and fixing a sample, the two sides of the metal sheet are connected with the metal support feet respectively, the metal support feet can be opened outwards spontaneously, and the metal support feet can be folded inwards under the action of external force; after the elastic metal sheet bracket is placed in the headspace bottle, the metal support feet on the two sides of the elastic metal sheet bracket are opened outwards spontaneously, and a sampling needle piercing space is res