Filtering device for chromatographic analysis

The utility model discloses a filtering device for chromatographic analysis, which comprises a base, a support rod and a lifting lock, a fixed seat is connected onto the lifting lock, a buckling cover is arranged on the fixed seat, one side of the buckling cover is hinged with the fixed seat, the other side of the buckling cover is connected with the fixed seat through a fastening lock, an air guide pipe is arranged on the buckling cover, and a pressure reducing valve is arranged at the top of the air guide pipe. The pressure reducing valve is connected with an air inlet pipe and a pressure gauge respectively, a replacement module is arranged in the fixed seat, a pipettor gun head is arranged in the replacement module, a receiving bottle is arranged in the fixed clamp, the receiving bottle is located below the pipettor gun head, and a pressure pump connected through the air inlet pipe can provide enough pressure for filtration. According to the utility model, the filter module is arranged in the fixed seat, s