Device for testing influence of rock mass blasting excavation on highway subgrade

The utility model discloses a device for testing the influence of rock mass blasting excavation on a highway subgrade in the field of blasting experiments, which comprises a base, a reference box is fixedly connected to one side wall of the base in the width direction, a first opening is formed in the top of the reference box, and fine sand is filled in the reference box; the end, close to the reference box, of the top of the base is fixedly connected with a supporting base, a pipeline is arranged on the supporting base, one end of the pipeline is located above the reference box, and the other end of the pipeline penetrates through the supporting base and is fixedly connected with a hollow vertical plate. A screw rod is rotated to drive a limiting plate to move, and the limiting plate is used for fixing a test rock mass, so that the test rock mass is prevented from greatly moving to influence an experiment result during blasting to a certain extent; and the gravitational potential energy of the reference ball