Lightweight automobile rear seat

The utility model discloses a light-weight automobile rear-row seat, and relates to the technical field of seats, in particular to the light-weight automobile rear-row seat which comprises a seat frame, and a bottom framework is integrally arranged at the bottom of the seat frame; a seat cushion is also arranged above the seat frame; a first clamping piece and a second clamping piece are fixed at the two ends of the bottom framework; when the seat is installed, a clamping plate is firstly pushed into a locking buckle, the elastically-arranged locking buckle stretches into a clamping groove in the clamping plate, clamping and fixing of one end of the seat are achieved, then a round head clamping piece at the other end of the seat is slightly pressed downwards, the round head clamping piece compresses a first movable piece and a second movable piece towards the two sides to abut against a spring, and the first movable piece and the second movable piece abut against the spring. The round head clamping piece is c