A toilet inlet valve, comprising a valve body, an inlet pipe, a water stop device with a water stop rubber gasket, a float bowl device, a raising rod device and an outlet pipe, wherein the water stop device also comprises: a water stop seat, which is located, with respect to the flow direction of water, at the front end of the outlet pipe, an opening of the water stop seat is coupling with the end face of the water stop rubber gasket; a tray, which is connected to the water stop rubber gasket, and is located at the side of the water stop rubber gasket that is opposite with respect to the water stop seat; a needle valve, which is fixed to the tray, and is located at the side of the tray that is opposite with respect to the water stop rubber gasket; a back pressure cavity, which is a cavity with a discharge hole, the back pressure cavity containing a needle valve cover, the tray, the needle valve and the water stop rubber gasket, wherein the back pressure cavity is further provided with a needle valve hole in the needle valve cover, the needle valve hole sleeving to the needle valve; wherein water enters the valve body through the inlet pipe in which inlet pipe the water is divided into two ways, one way is a main way, the other way is a control branch; wherein in the main way, water enters a fluid cavity of the inlet pipe, and after the fluid cavity reaches the water stop rubber gasket, and wherein then a reverse water pressure to the water stop rubber gasket is generated, which reverse water pressure is provided with an opposite direction to the water flow direction in the inlet pipe; and wherein in the control branch, water passes through a gap between the needle valve and the needle valve hole, and then reaches the back pressure cavity, and wherein then a downstream water pressure to the tray is generated, which downstream water pressure is provided with same direction to the water flow direction in the inlet pipe. a water stop seat, which is located, with respect to the flow direction of water, at the front end of the outlet pipe, an opening of the water stop seat is coupling with the end face of the water stop rubber gasket; a tray, which is connected to the water stop rubber gasket, and is located at the side of the water stop rubber gasket that is opposite with respect to the water stop seat; a needle valve, which is fixed to the tray, and is located at the side of the tray that is opposite with respect to the water stop rubber gasket; a back pressure cavity, which is a cavity with a discharge hole, the back pressure cavity containing a needle valve cover, the tray, the needle valve and the water stop rubber gasket, wherein the back pressure cavity is further provided with a needle valve hole in the needle valve cover, the needle valve hole sleeving to the needle valve; wherein water enters the valve body through the inlet pipe in which inlet pipe the water is divided into two ways, one way is a main way, the other way is a control branch; wherein in the main way, water enters a fluid cavity of the inlet pipe, and after the fluid cavity reaches the water stop rubber gasket, and wherein then a reverse water pressure to the water stop rubber gasket is generated, which reverse water pressure is provided with an opposite direction to the water flow direction in the inlet pipe; and wherein in the control branch, water passes through a gap between the needle valve and the needle valve hole, and then reaches the back pressure cavity, and wherein then a downstream water pressure to the tray is generated, which downstream water pressure is provided with same direction to the water flow direction in the inlet pipe.