The invention discloses an installation and operation and maintenance method of a pressure-stabilizing pilot drive valve. The pressure-stabilizing pilot drive valve comprises a hexagonal upper valve body, an upper pressing plate, a diaphragm, a lower pressing plate, a stand column, a first through hole, a valve plate, a valve rod, a lower guide frame, a second through hole, an upper guide frame, alower valve body, a lower spring and an air cylinder, wherein the air cylinder comprises a left cavity, a middle cavity, a right cavity, an air inlet, a pressure regulating port, a pressure relief port, a right port, a left piston, an upper spring, a right piston, a limiting column, a hemisphere cover, a pivot and a connecting plate, and a containing groove is formed in the connecting plate. Theinstallation and operation and maintenance method comprises a mounting method, a testing method, and an operation method, wherein the testing method comprises the following steps that the pressure ofthe air inlet end of the valve is improved, the pressure above the diaphragm is improved, the valve plate is opened, the pressure of the air outlet end of the valve is tested, when the pressure of theair outlet end meets a preset value, after the pressure of the air inlet end is maintained for thirty minutes, the integrity of the diaphragm is detected, so that the pressure-bearing capability of the diaphragm under extreme pressure is tested.