Fixture structure of pram wheels

The utility model relates to a fixing structure of pram wheels, which can limit a cap buckle and a wheel mandrel for preventing relative motion. In the utility model, the shaft top of the wheel mandrel is provided with an inner groove; the cap buckle is provided with a corresponding clamping detent convex block. When the cap buckle is sheathed on a clamping and combining ditch of the wheel mandrel, the inner groove of the shaft top of the wheel mandrel matches and clamps with the clamping detent convex block on the cap buckle. When the cap buckle is fixed on the clamping and combining ditch and wheels are rotated, the cap buckle can not generate relative motion with the wheel mandrel, the friction generated by the cap buckle and the wheel mandrel is prevented, the collocation relationship of the wheels on the wheel mandrel is ensured.