Seat rack of folding wheelchair

The invention relates to the wheelchair folding technology, in particular to a seat rack of a folding wheelchair. The seat rack of the folding wheelchair can be unfolded automatically. The seat rack comprises a front support, a rear support and a front and rear support base, and is characterized in that the lower half portion of the front support is of a forked structure and stretches across the front and rear support base; a position locking device is arranged between the front support and the front and rear support base; meanwhile, the seat rack is further provided with a wheelchair rack folding control mechanism which comprises a button, a button base, a folding linkage rod, a tripod linkage unit, an upper linkage piece, a lower linkage piece, an upper push rod, a lower push rod and a tension spring. The seat rack can be folded and can also be unfolded automatically. Compared with the prior art, the seat rack has the advantages that the seat rack is convenient to fold and unfold, capable of saving effort i