Abstract: A pressure relief valve includes a valve body with a hollow internal cavity. The internal cavity has two opposite ends, which are in communication with a high-pressure side and a low-pressure side of the pressure relief valve respectively. The pressure relief valve further includes a separating plate disposed in the valve body and located in the hollow internal cavity, and a penetrating member configured to slide linearly in the valve body. The penetrating member has a force applied thereto from the low-pressure side towards the high-pressure side by an elastic component located in the internal cavity. The pressure relief valve further includes a locking structure disposed in the valve body in a fixed manner and spaced apart from the separating plate. The penetrating member is locked in a cut-off state of the pressure relief valve by the locking structure.