The invention discloses a method for synthesizing a gamma, delta-nonsaturated ketones compound. The method comprises the following steps: under protection of inert gas, nonsaturated alcohol and 2-alkyloxy propylene are taken as the raw materials, Bronsted acid functional ionic liquid is dissolved in a high boiling solvent as a catalyst, a rearrangement reaction is carried out, after the reaction is complete, the materials is subjected to post-treatment to obtain the gamma, delta-nonsaturated ketones compound and a catalyst solution. The used Bronsted acid functional ionic liquid catalyst has a plurality of physical and chemical properties which are similar with the conventional ionic liquid, the acid functional group is introduced, so that the catalyst has the advantages of high acid site density, adjustable acidity, uniform acidity distribution and difficult loss of acidity. An autoclave series mode is used for realizing the continuous synthesis of nonsaturated ketone and continuous recycling of the catalyst.