The invention relates to the technical field of electrical equipment, and particularly relates to a dustproof ventilation type power electrical equipment cabinet. The power electrical equipment cabinet comprises a shell, wherein a cavity is formed in the shell, rectangular through grooves are formed in the left side and the right side of the shell, inserting grooves are formed in the rectangular through grooves, the inserting groove is internally provided with a dust screen and a fixing plug, a circular groove is formed in the top of the cavity, and filter screens are arranged at the upper endand the lower end in the circular groove; and a motor and fan blades are arranged between the two filter screens. According to the invention, the dust screens, the filter screens, the motor and the fan blades are arranged, an output shaft of the motor drives the fan blades to rotate, external air passes through the filter screens to filter out dust and is then blown into the cavity by means of rotation of the fan blades, when air pressure in the cavity is too high, air overflows to the outside from the dust screen, it is guaranteed that the air in the cavity flows, and if dust falls on an electric appliance wire in the cavity, the dust can also be blown out of the dust screen by the air blown in by the fan blades, so that air circulation in the cavity is guaranteed, moisture is prevented,and dust falling is avoided.