The invention relates to a nuclear magnetic resonance imaging gripper, which comprises a barrel, a sample tube arranged in the barrel, two core plugs, an upper end seal head and a lower end seal head, wherein the barrel is made of high-strength nonmetallic material; the cavity of the barrel is provided with an accommodating area for accommodating the sample tube; a clearance through which cooling liquid passes is reserved between the sample tube and the inner wall of the barrel; a thermal shrinkage tube is adopted as the sample tube; the two core plugs are arranged at two ends of the sample tube to grip two ends of a sample respectively; the upper end seal head and the lower end seal head are screwed into two ends of the barrel to seal the barrel respectively; the two core plugs pass through the upper end seal head and the lower end seal head and extend out of the barrel respectively; interfaces communicated with the outside are formed in the upper end seal head and the lower end seal head; and passages for circulation of water and gas are formed in the two rock plugs. Therefore, the nuclear magnetic resonance imaging gripper can apply a natural deposition layer to an nuclear magnetic resonance imaging experiment, has simple and convenient operation and low cost, and can avoid the interference of a metal material to nuclear magnetic imaging signals.