The utility model discloses a load rock core holder of loose sand, which comprises a sleeve, the both ends opening all sets up the pressure cap about telescopic, press the cap center and set up axially extending bore, press the cap still to set up the filter screen, this filter screen will block the axially extending bore who presses the cap center at least. The filter screen sets up at the interior terminal surface of pressing the cap, should be the terminal surface towards the sleeve inner chamber by interior terminal surface. The medial surface of filter screen is still with overflowing the clamp plate. The utility model discloses can satisfy when a bit the shaping rock core can not got to the oil field block needs that flow and test with the stratum loose sand.