The utility model relates to a mechanical keystroke device used for portable small-sized equipment, in particular to a mechanical keystroke device which can prevent the keys from linking. The mechanical keystroke device comprises a plurality of function keys, a plurality of keystroke elastic sheets corresponding to the function keys, and an anti-linkage component which can prevent the keys from linking. The anti-linkage component is arranged at the boundary of the adjacent function keys and has a stereoscopic convex structure. Furthermore, the keystroke elastic sheets are connected with a circuit board in a light-touch way so as to arouse signal response. In the utility model, the linkage error operations among all function keys can be prevented by the anti-linkage component, thus realizing exact and sensitive keystroke operations, thereby solving the technical problem of the input device of the minitype equipment in recent years. In addition, the utility model also provides a portable television set that is provided with the mechanical keystroke device.