The invention relates to a computer host. The computer host is characterized in that elastic needle rows obviously protrude from back walls of cavities for certain distances so that protrusion parts are formed; when a triggering device is trigged to be in a first position, a trigger end presses the protruding parts and the protruding parts drive the elastic needle rows to move downwards, the elastic needle rows are separated from fixed finger rows of RJ45 terminals and electric connection between the elastic needle rows and the fixed finger rows are broken; and when the triggering device is triggered to be in a second position, the triggering end release the protruding parts, the protruding parts are recovered to be in the first state under the effect of the elastic force, the elastic needle rows are in contact with fixed finger rows of RJ45 terminals and electric connection between the elastic needle rows and the fixed finger rows are established. According to the invention, additional lapping points are not required; compared with a connector with a key switch, the computer host is characterized by quite high signal intensity and is highly efficient; few of parts are used so that the computer host is compact in structure; the welding step is not required, so unstable network connection caused by pseudo soldering and solder skips can be avoided; and operation is performed on the front face or the side face, so the computer host is convenient to switch on and switch off.