The invention discloses an automobile tire safety device and a parameter setting method thereof, belongs to the technical field of automobile tire blasting prevention, and aims to solve the problem that an adaptable automobile type range of an existing automobile tire safety device is small. The automobile tire safety device is characterized in that the outer diameter of an outer layer of the automobile tire safety device is equal to the inner diameter of a tire, and the inner diameter of an inner layer is equal to the nominal diameter of a rim; transparent hexagonal holes are formed in each layer along the radial direction of the tire; the hexagonal holes in each layer are distributed in a honeycomb shape; the hexagonal holes in three layers are in one-to-one correspondence; correspondinghexagonal holes are communicated; the edge length of the hexagonal holes in all surfaces from outside to inside are gradually reduced. The parameter setting method of the automobile tire safety device comprises the following steps: setting surface outer structure parameters of the outer layer, and setting the structure parameters of a middle layer and the inner layer according to the outer surface structure parameters of the outer layer. The automobile tire safety device designed by adopting the parameter setting method is wide in adaptable automobile type range and convenient to install, repairing and maintenance of automobiles are convenient, the comfort and the stability of driving of the automobiles cannot be affected, and a traffic accident caused by sudden tire blasting during high-speed driving can be effectively reduced.