A switching device (104), a terminal and a method for terminal heat dissipation. The switching device (104) comprises a first heat dissipation conductor (201), a second heat dissipation conductor (203) and a connection structure (202) disposed between the two heat dissipation conductors; the connection structure (202) is used to achieve disconnection and connection between the first heat dissipation conductor (201) and the second heat dissipation conductor (203); the terminal comprises a holding part detection device (101), a temperature detection device (106) disposed in a heat source region of the terminal, the abovementioned switching device (104), a processor device (103), and a plurality of heat sinks (105) distributed in the heat source region and a non-heat source region of the terminal, and the switching device (104) is disposed between the heat source region and the non-heat source region of the terminal. The terminal disperses heat from the heat source region held by a user to areas in the non-heat
