Vehicle, sub-frame mounting structure and design method of sub-frame mounting structure

The invention relates to a vehicle, a sub-frame mounting structure and a design method of the sub-frame mounting structure, wherein the sub-frame mounting structure comprises vehicle body mounting brackets and connecting bolts; the vehicle body mounting brackets are connected between a sub-frame and a floor first cross beam; the connecting bolts are used for connecting the vehicle body mounting brackets with an upper connecting plate and a lower connecting plate of the sub-frame; a reinforcing support is further fixedly arranged on each vehicle body mounting bracket; a notch facing each reinforcing support is formed in each bolt mounting hole; during collision, the connecting bolts squeeze the notches to enable the notches to undergo tear deformation and extend toward the reinforcing supports; and the connecting bolts move with the tear deformation to the reinforcing supports until the connecting bolts break. According to the sub-frame mounting structure, the dynamic collision space ofa whole vehicle can be i