The invention discloses a luggage compartment gel cool storage agent including the following raw materials by mass: 5-9% of acrylic acid, 15-21% of sodium chloride, 9-12% of ethyl acetate, 2-6% of nano silicon dioxide, 3-8% of maltodextrin and balance of water. At room temperature, the acrylic acid and the ethyl acetate are added into water, sealed and mixed; the temperature rises up to 40-50 DEG C, then the maltodextrin is added, sealed and mixed, the temperature rises up to 85-90 DEG C, the nano silicon dioxide is added, sealed and mixed, and the luggage compartment gel cool storage agent is obtained by cooling to room temperature. The luggage compartment gel cool storage agent is gelatinous, non-toxic, tasteless, safe, reliable, effective, environmentally friendly, simple in preparation method, wide in raw material sources, and low in cost; the experiment proves that the luggage compartment gel cool storage agent has the appropriate phase change temperature and larger phase change latent heat, the phase change temperature is-10 to 1 DEG C, the phase change latent heat is 260 KJ/Kg-285 KJ/Kg, and the luggage compartment gel cool storage agent is especially suitable for luggage compartments.