Piggyback vehicle and vehicle body thereof

Disclosed are a piggyback vehicle and a vehicle body thereof. The vehicle body comprises a body part (1) and a supporting part (4), wherein a connecting structure is arranged at each of two longitudinal ends of the supporting part (4), and each connecting structure comprises an upper hook (421) and a lower circular shaft (412c) extending in the transverse direction; and the body part (1) is provided with an end connecting mechanism (22), the end connecting mechanism (22) comprises an end connecting hook (221) and an end longitudinal supporting member (222), the end connecting hook (221) forms an upward hook opening, and in an assembled state, the lower circular shaft (412c) can be hung on the hook opening of the end connecting hook (221), and the upper hook (421) can be clamped onto the end longitudinal supporting member (222). By using such a structure, two connecting points may exist between the two longitudinal ends of the supporting part (4) and the body part (1), and the supporting part (4) and the body part (1) are reliably connected; and during separation, by means of lifting the body part (1), the body part (1) and the supporting part (4) can rotate relative to one another by taking the central axis of the lower circular shaft (412c) as a rotation central line, such that the joint between the upper hook (421) and the end longitudinal supporting member (222) is forced to become loosened, and the supporting part (4) can be conveniently separated from the body part (1).