As a key technical method for the exploration of marine natural gas hydrates， pressure-temperature sampling is a core technical method for obtaining in-situ samples of hydrates. This article reviews the relevant data of pressure-temperature core samplers at home and abroad， and analyzes domestic marine natural gas hydrate pressure-temperature core samplers in terms of the working principle， structural characteristics， and experimental applications. The domestic pressure-temperature core sampler has been able to sample in soft to medium-hard to hard formations by adopting different working principles. The performance indicators of domestic pressure-temperature core samplers in field applications， such as pressure retention success rate， core recovery， can also meet the sampling needs； thus effectively facilitating the process of independent natural gas hydrate exploration and evaluation by China.