An internally dismantled anti-typhoon soundproof horizontal sliding window, which is fastened to an outer frame body and is provided with at least one outer sliding window and an inner sliding window; it is characterized in that: the outer side of the outer frame body is provided with at least one outer fixing column, an elastically movable top plate is provided on the inside and outside of the outer fixed column; when the two windows are closed, a central control lock can be used to drive the top plate to move through the inner columns of the outer and inner windows inwardly, the top plate squeezes the two inner column clamps tightly; the outer column of the outer frame body is provided with a hook, which can be used for the outer sliding window and the outer column of the inner sliding window; a snap cover that seals the grooves of the outer frame; thus, the window structure can be tightly closed in an all-round way, so as to meet the requirements of windproof, rainproof and sound insulation of the strong typhoon level.