Rocket hose emptying and blowing test system and test method

The invention discloses a test system and a test method for emptying and blowing off a hose for a rocket. The device comprises a liquid inlet tank, a liquid inlet pipeline, a tested hose, a liquid discharge pipeline and a liquid collection tank arranged on a weighbridge which are sequentially connected from high to low. Wherein the liquid inlet tank is provided with a first liquid path stop valve, the blow-off gas supply unit is provided with a first gas path stop valve, and the liquid collecting tank is provided with a second gas path stop valve. When the first liquid path stop valve is opened and the first gas path stop valve and the second gas path stop valve are closed, the propellant in the liquid inlet tank is filled into the tested hose through the liquid inlet pipeline. When the first liquid path stop valve is closed and the first gas path stop valve and the second gas path stop valve are opened, the blow-off gas supply unit is used for emptying and blowing off the propellant of the tested hose, so th