Foldable rear backrest seat of all-terrain vehicle

The invention discloses a foldable rear backrest seat of an all-terrain vehicle, which comprises a main bracket, a pedal bracket and a turnover component, a main panel is arranged on the main bracket, a pedal panel is arranged on the pedal bracket, a turnover cushion is arranged at the front part of the main bracket, and the turnover component is arranged on the front part of the main bracket. A turnover assembly is arranged on the upper portion of the pedal support, a turnover back cushion is arranged on the upper portion of the main support, the turnover assembly is located between an unfolding position and a folding position, when the turnover assembly is located at the unfolding position, the pedal support is unfolded below the main support, and the back cushion is unfolded above the main support. When the turnover assembly is located at the folding position, the pedal support is folded below the main support, and the back cushion is folded above the main support. Due to the fact that a linkage operation