Nail-free assembly type keel frame and assembly method

The invention discloses a nail-free assembly type keel frame and an assembly method. The nail-free assembly type keel frame comprises a plurality of installation keels and a plurality of groove clamping pieces, the vertical keel comprises a first bottom plate, two first side plates and two first folded plates, the first folded plates are arranged to be located on the opposite end faces of the two first side plates and bent towards the first bottom plate, and first through holes are formed in the first bottom plate; two second folded plates are arranged on the edge of the first through hole; the transverse keel is connected with the vertical keel through the groove clamping piece, the first clamping piece extends into the vertical keel through the first through hole and is buckled on the second folded plate through the buckling groove assembly, and the second clamping piece is buckled on the first folded plate through the buckling groove assembly. The assembly method is applied to the nail-free assembly type k