The invention discloses a rear adjustable three-hole composite type waterproof hammer air group valve. The air group valve is integrally or separately arranged on a liquid conveying pipeline or a container system, a high-speed exhaust hole of the air group valve can be adjusted and controlled, is arranged alone, and is generally smaller than suction holes, the high-speed exhaust hole and the high-speed suction holes are formed separately and are not shared for use, independent model selection and adjustment can be conducted, the requirements of high-speed exhaust and high-speed gas suction for two different quantities of flow or two different diameters or two proportions are met, and meanwhile two built-in type gas bags are formed quite ingeniously. The group valve combines independent intermediate-speed exhaust, independent high-speed gas suction and trace amount exhaust, and has a dozen of functions, namely, the independent intermediate-speed exhaust function, the independent high-speed gas suction function, the trace amount exhaust function, the function of a high-suction and intermediate-exhaust waterproof hammer, the function of a high-suction and trace-exhaust waterproof hammer, the function of a built-in gas bag waterproof hammer, the built-in gas bag anti-freezing function, the function of a rear adjusting control valve and the function of monitoring the hole pressure difference and the total pressure difference on site in the empty pipe liquid filling process through two pressure meters. The various ventilation and safety protection requirements of a liquid path system can be met.