The utility model discloses a pressure filter. The pressure filter comprises a filter tank body (8) and is characterized in that the upper end of the filter tank body (8) is connected with a sealing cover (1) which is provided with a reagent feeding port and a high-pressure gas cylinder port (3); the reagent feeding port is connected with a sealing bolt (2); a baffle plate (12) is arranged in the lower part of the filter tank body (8); a filter element (11) is arranged on the baffle plate (12); and the bottom of the filter tank body (8) is provided with a low-temperature filtrate receiver (13). When the pressure filter is used for separating prepared organic matter samples, light organic matter components are kept, samples are provided for research on new indexes of organic geochemistry, and the safe and environment-friendly requirements are met.