The invention discloses a testing device and a testing method for simulating
hydrodynamic pressure action in rock fracture. A
rock sample with a crack is placed into a testing water tank, the position of the
rock sample is adjusted to enable a crack to directly face a rectangular hole; testing water flows are pumped into the testing water tank to be subjected to
hydrodynamic pressure testing through a water injection
pipe by a high-pressure
water supply pump; a pressure meter, a
pressure control valve and a
pressure release valve are arranged on the testing water tank for controlling the flow pressure and the flow rate of the inside of the testing water tank; and an anchorage point is arranged on the testing water tank and is connected with a displacement meter and the
rock sample, a
pressure sensor, a flow sensor and the displacement meter are arranged on the water injection
pipe and are used for transmitting the acquired data to a
data acquisition instrument and are connected with a computer, and the computer is used for recording the testing data such as pressure, flow rate, the change of the
diameter of the rock sample and the like. The structure is simple, the
processing operation is easy and the operation is convenient.