Device internal atmosphere sampling clamp and content testing device

The invention relates to a device internal atmosphere sampling clamp and a content testing device. The device internal atmosphere sampling clamp comprises a base and a sample table, a first groove is formed in the base, and a first puncture hole allowing a puncture needle to penetrate through is formed in the bottom wall of the first groove; the sample table is placed in the first groove, a second groove is formed in the end face, away from the first puncture hole, of the sample table, a sealing cover is arranged at an opening of the second groove and abuts against the end face of the sample table in a sealed mode, and a sealed containing cavity is defined by the second groove and the sealing cover and used for containing a device to be tested. A second puncture hole for the puncture needle to penetrate through is formed in the position, corresponding to the first puncture hole, of the bottom wall of the second groove, the second puncture hole is communicated with the first puncture hole, and the puncture nee