Gas valve and stove

The gas valve comprises a shell, a valve element, a valve rod and a positioning block, a mounting hole is formed in the shell, and a limiting structure is arranged on the periphery of the outer end of the mounting hole; the valve element is rotatably arranged in the shell so as to adjust the opening degree. The valve rod can rotate in the circumferential direction and is movably connected with the shell in the axial direction, a handle part of the valve rod extends out of the shell from the outer end of the mounting hole and is provided with a positioning piece, and the positioning piece is suitable for being limited by a limiting structure to limit the rotating angle of the valve rod; the positioning block is arranged in the shell, the positioning block is provided with a locking position and an unlocking position in the axial direction, the positioning block is locked at the locking position, can rotate at the unlocking position and is suitable for driving the valve element, and the positioning block and th