The invention provides an armour type metal closed switch cabinet with a voltage transformer handcart. A handcart chamber of the armour type metal closed switch cabinet with the voltage transformer handcart is provided with a voltage transformer handcart, and a disconnector chamber of the armour type metal closed switch cabinet with the voltage transformer handcart is provided with a bypass disconnector. A handcart chamber decompressing plate is arranged on the handcart chamber. A disconnector chamber decompressing plate is arranged on the disconnector chamber. A main bus chamber decompressing plate is arranged on a main bus chamber. The handcart chamber, the disconnector chamber and the main bus chamber are respectively provided with an electric arc airflow decompressing channel. Openings of electric arc airflow decompressing channels are formed in the top of an armour type metal closed switch cabinet body. A fixed contact of the voltage transformer handcart is connected with a main bus in the main bus chamber through a first connecting copper bar. The main bus passes by a wall penetrating sleeve, and is connected with the bypass disconnector through a second connecting copper bar at the same time. The bypass disconnector is connected with an interbus through a third connecting copper bar. The armour type metal closed switch cabinet with the voltage transformer handcart has the advantages that corrosion prevention performance is good, safety performance and a high integration degree are achieved due to the fact that a high voltage and a control low voltage in the armour type metal closed switch cabinet with the voltage transformer chamber are separated through the steel plates, a function of avoiding error interlocking is achieved, installation is simple and convenient, a safety margin is increased by more than 15%, and a bus needs less maintenance or is maintenance-free.