The invention discloses an automatic reset automobile folding seat mechanism. The automatic reset automobile folding seat mechanism comprises a seat cushion bracket, a seat bracket, a seat back bracket, a locking mechanism, a connecting rod mechanism and a rotary connecting rod, wherein the seat cushion bracket is hinged to the seat bracket and the seat back bracket correspondingly through rotating shafts; the rotating shafts are sleeved with torsion springs, and the locking mechanism is arranged on the seat bracket and is used for realizing locking and unfolding of a seat; and the connectingrod mechanism is correspondingly connected with the seat bracket and the seat back bracket, and the locking mechanism and the connecting rod mechanism are correspondingly connected to both ends of therotary connecting rod. The automatic reset, folding and turning up of the seat are realized without manpower and a motor, the operation of unfolding, folding and resetting of the seat is convenient,and the cost is low; and the automobile folding seat mechanism is small in size, and an existing automobile seat can be modified without occupying too much space.