Pressure buffering device of liquid chromatograph

The utility model discloses a pressure buffering device of a liquid chromatograph. The pressure buffering device comprises a base and a gland which is connected to the base, wherein a boss is arranged on the upper end surface of the base, a groove is arranged in the center of the boss, a rubber damping block is filled inside the groove, an isolation film is adhered onto the upper surface of the boss, a buffering groove is arranged in the lower end surface of the gland, the diameter of the buffering groove is matched with that of the boss, and the depth of the buffering groove is greater than the height of the boss; the gland is also provided with a mobile phase inlet, a mobile phase outlet and a connecting hole, which are respectively communicated with the buffering groove, and a pressure sensor probe is connected into the connecting hole. The pressure buffering device is small in size, high in reliability and free from polluting a system flow path; the pulse of a high-pressure constant-current pump can be ef