A hand-held vacuum cleaner, comprising: a housing provided with an air inlet, an air outlet and an air blowing vent, the air blowing vent being disposed adjacent to the air inlet; a dust cup disposed to the housing, the dust cup being connected to the air inlet; and an electrical motor provided with an electrical motor chamber, and configured to allow an airflow entering from the air inlet flowing through the dust cup and the electrical motor, and switchably flowing out through at least one of the air outlet and the air blowing vent by means of a switching mechanism; wherein the switching mechanism is configured to be movable between a communication position communicating the air blowing vent with the electrical motor chamber and an isolation position isolating the air blowing vent from the electrical motor chamber, and wherein the switching mechanism closes or partially closes the air outlet when the switching mechanism is in the communication position, and wherein the air outlet is in communication with the electrical motor chamber when the switching mechanism is in the isolation position; and characterized in that the switching mechanism comprises a push plate movably disposed to the housing, and a communicating opening is formed in the push plate, and wherein the communicating opening is operable to communicate the air blowing vent and the electrical motor chamber when the switching mechanism is in the communication position; and wherein the push plate is provided with a closing plate, and the closing plate is operable to close or partially close the air outlet when the switching mechanism is in the communication position. a housing provided with an air inlet, an air outlet and an air blowing vent, the air blowing vent being disposed adjacent to the air inlet; a dust cup disposed to the housing, the dust cup being connected to the air inlet; and an electrical motor provided with an electrical motor chamber, and configured to allow an airflow entering from the air inlet flowing through the dust cup and the electrical motor, and switchably flowing out through at least one of the air outlet and the air blowing vent by means of a switching mechanism; wherein the switching mechanism is configured to be movable between a communication position communicating the air blowing vent with the electrical motor chamber and an isolation position isolating the air blowing vent from the electrical motor chamber, and wherein the switching mechanism closes or partially closes the air outlet when the switching mechanism is in the communication position, and wherein the air outlet is in communication with the electrical motor chamber when the switching mechanism is in the isolation position; and characterized in that the switching mechanism comprises a push plate movably disposed to the housing, and a communicating opening is formed in the push plate, and wherein the communicating opening is operable to communicate the air blowing vent and the electrical motor chamber when the switching mechanism is in the communication position; and wherein the push plate is provided with a closing plate, and the closing plate is operable to close or partially close the air outlet when the switching mechanism is in the communication position. wherein the switching mechanism is configured to be movable between a communication position communicating the air blowing vent with the electrical motor chamber and an isolation position isolating the air blowing vent from the electrical motor chamber, and wherein the switching mechanism closes or partially closes the air outlet when the switching mechanism is in the communication position, and wherein the air outlet is in communication with the electrical motor chamber when the switching mechanism is in the isolation position; and characterized in that the switching mechanism comprises a push plate movably disposed to the housing, and a communicating opening is formed in the push plate, and wherein the communicating opening is operable to communicate the air blowing vent and the electrical motor chamber when the switching mechanism is in the communication position; and wherein the push plate is provided with a closing plate, and the closing plate is operable to close or partially close the air outlet when the switching mechanism is in the communication position.