The invention relates to the technical field of computer peripherals, and discloses a KVM switcher capable of automatically controlling power-on, a switching method and
electronic equipment.The KVM switcher comprises a state detection module and a power supply control module which are in communication connection, the state detection module comprises a
voltage detection circuit, and the
voltage detection circuit is electrically connected with a host
USB interface and used for detecting the output
voltage of the host
USB interface; the detected voltage
signal is converted into a level
signal for judging the state of the host; the state detection module sends a level
signal used for judging the state of a host to the power supply control module, and the power supply control module is used for controlling the power supply state of a downlink interface according to the level signal. In the invention, the downlink
USB interface is not always in a power supply state, so that the
energy loss is effectively reduced. Moreover, whether the downlink USB power supply is enabled or not is determined only according to the host state, so that the compatibility problem that the equipment is not identified due to the
time sequence problem is avoided, and the compatibility of the multi-computer switcher is improved.