Control gas circuit and adsorption device

The embodiment of the utility model discloses a control gas circuit capable of preventing falling during gas cut-off and being firmly taken and placed and an adsorption device, the control gas circuit comprises a negative pressure source, a first control valve, a soft suction cup and a hard suction cup, and the negative pressure source is used for providing pneumatic drive; the first control valve is connected with a negative pressure source; the soft suction cup is connected with the first control valve, a one-way valve is arranged on an air path connecting the soft suction cup and the first control valve, and the one-way valve is arranged in a ventilation mode in the direction from the soft suction cup to the first control valve. And the hard sucker is connected with the first control valve. The soft suction cup and the hard suction cup are matched for use, the one-way valve is arranged in the corresponding air path of the soft suction cup, and when air of a negative pressure source is suddenly cut off, the