The utility model relates to a fixing spray system pressure-sharing device which comprises a cone-shaped outer shell, a float switch, a regulating spring, a spray head and a support, wherein the spray head and a water inlet pipe are connected by the cone-shaped outer shell, and the regulating spring is arranged on the support which is arranged at the bottom of the inner side of the interior of the cone-shaped outer shell. The float switch is connected on the regulating spring, and the float switch can slide back and forth along a guide rail which is fixed on a support room of the top and the bottom of the interior of the cone-shaped outer shell. For reducing incoming flow impact damage, the head portion of the upper end of the float switch is of a circular arc shape. Cone-shaped outer shells, and float switches and regulating springs of different sizes can be matched and used with various spray heads which fix a spray system so as to regulate pressure and speed at an inlet of each spray head to be consistent. When the pressure and the speed at the inlet of each spray head is fixed, water which is sprayed by the spray head can be consistent in flow and spray radius, so that the purpose of even water distribution can be achieved.