The invention relates to a sliding column type tooth-inlaying clutch which can clutch automatically, in particular to a two-way manually manipulating automatic clutch mechanism which can be applied toa high-voltage circuit breaker and also other automatic clutch mechanisms which need two-way operation. The clutch is characterized in that a driven semi-clutch, a drive semi-clutch, a square set anda block set are arranged on a square shaft in sequence; a key and a sprocket are arranged on the drive semi-clutch; a top pillar is welded on the driven semi-clutch; a sliding pillar which touches the top pillar is installed in two arc-shaped grooves of a fixed plate; the driven semi-clutch passes through the through hole of the fixed plate to be engaged with the drive semi-clutch; a press springand a power spring are arranged on the square shaft. The clutch has simple, compact and reasonable structure, can be driven in a two-way manner and clutch automatically in the driven process so as tobe applied to the high-voltage permanent-magnet circuit breaker, realize manual gateway folding and unfolding functions, and meet the product design requirements.