The toy water gun includes a gun shell, a water storage container and a water injection control device in the gun shell, an inflation device at the front end of the gun shell, and a water spray head at the muzzle. The water valve of the toy water gun is connected with the water spray head, and the user inflates the water storage container through the inflation device. When the trigger is pressed to open the water valve, the water injection control mechanism causes the water under high pressure in the water storage container to be transmitted to the water spray head, and the water flow is directly ejected from the water spray head. Therefore, the ejected water has a long range and a large amount of water, and can continuously eject water, which greatly improves the interest of the toy water gun.