The invention discloses an intermittent type supersonic sand erosion test bed. The intermittent type supersonic sand erosion test bed comprises a gas source system, a sand supply device, a sand blasting device, a test chamber and a shooting system, wherein a high-pressure gas cylinder and a gas storage tank are adopted as a gas source for supplying high-pressure gas; a filling pressure numerical value from the high-pressure gas cylinder to the gas storage tank can be accurately controlled; the lowest pressure for starting a Laval nozzle for forming a supersonic gas flow can be ensured. The Laval nozzle serves as an accelerating device; the Laval nozzle is of a curved surface profile design so that high-quality gas flow is formed and then the sand in a sand mixing pipe can be accelerated along a straight line in a pipeline as possible. Therefore, the sand is prevented from being collided with a pipe wall, and the problem of crushing caused by colliding with the pipe wall in an accelerating process of the sand is solved well.