The invention discloses a heat dissipation device used in the equipment, which is characterized in that the device comprises a heat conductive silica gel, a heat pipe and a heat dissipation plate; Oneend of the heat pipe is connected with the heat conductive silica gel, and the other end is connected with the heat dissipation plate; The heat conductive silica gel and the heat pipe are arranged inthe cavity of the equipment in which the heating element is located, and the heat radiating plate is arranged outside the cavity of the equipment; The equipment shell of the heat dissipation device is in a sealed state, which solves the problem that the heat dissipation mode using the fan can not design the instrument into a sealed structure, and can not be well waterproof and dustproof.