Garbage bag treatment device and wet garbage collection and treatment device mounted in garbage bag

The invention discloses a garbage bag treatment device and a wet garbage collection and treatment device mounted in a garbage bag, and belongs to the field of garbage treatment. The garbage bag treatment device comprises a base, a supporting rod rotationally connected to the base, a first motor fixed to the base and used for driving the supporting rod to rotate, a control arm rotationally connected to the supporting rod, a second motor fixed on the supporting rod and used for driving the control arm to rotate, a workbench rotationally connected to the control arm, a third motor fixed on the workbench, and a bag clamp is fixed on a shaft of the third motor, the bag clamp comprises a clamp body, a left clamp body and a right clamp body, the left clamp body and the right clamp body are movable, and elastic components are connected between the left clamp body and the clamp body and between the right clamp body and the clamp body to clamp the garbage bag. The collection and treatment device comprises a machine she