The invention discloses an automobile seat capable of being unlocked in a one-key mode. The automobile seat comprises a seat cushion bracket and a backrest bracket, wherein the backrest bracket comprises fixed sections and a folding section; the fixed sections are positioned on the left side and the right side of the seat cushion bracket; the folding section is connected with the fixed sections through angle adjustors; the seat cushion bracket is slidingly arranged on longitudinal sliding rails with sliding locking pieces; a horizontal synchronous rod is arranged between the angle adjustors; the angle adjustor on one side of the horizontal synchronous rod is hinged to an angle locking piece; and an unlocking mechanism for unlocking the sliding locking piece and the angle locking piece is arranged on the fixed section on the same side as the angle locking piece. The automobile seat capable of being unlocked in the one-key mode is simple in structure and convenient to use, a seat backrest positioned on the end part of a second row can be quickly folded forwards by one unlocking key, the seat can be integrally slidden forwards, passengers on a third row can get on and off an automobile conveniently, and the use comfort degree of an MPV (multi-purpose vehicle) type automobile is improved.