A sun shading apparatus includes a supporting frame, a shading frame and a shading fabric. The supporting frame includes first and second leg frames, and a supporting bar extended between the first and the second leg frames, while the second leg frame has third and fourth mounting slots. The shading frame includes first and second coupling joints each having a V-shaped cross section, first and second frame members, and a reinforcing frame, wherein the supporting bar is extended between the first and second coupling joints. The first and the second frame member are coupled with the first coupling joint and the second coupling joint respectively, while the reinforcing frame is extended between the first and second frame member and the supporting bar to form a support platform. The shading fabric is detachably mounted on the support platform for shading adverse weather condition.