The utility model discloses a porous vegetation concrete permeability performance determinator. The porous vegetation concrete permeability performance determinator comprises vertical columns, a scaleplate, a water supplying container, a water intake pipe, a hood, a test specimen sleeve, bases, a water drainage pipe and a water drainage container, wherein the water supplying container is connected with the water intake pipe and the hood; the hood is provided with a water inlet; the test specimen sleeve is folded from the inner wall until reaching the position where outer walls of two ends are sleeved by rubber sleeves which play roles of fixing and sealing; the bases are connected with the water drainage pipe, and are provided with water outlets; the liquid level height of the water supplying container can be regulated by an upper slide base plate connected with the water supplying container for increasing or decreasing the water pressure difference, so that the data range of the permeability test is wider. The porous vegetation concrete permeability performance determinator provided by the utility model enables the test operation to be more flexible and convenient, can measure the permeability coefficient of a test specimen more accurately, and can be detached and measure at any time.