Belt tension adjusting device at transmission end

The utility model discloses a belt tension adjusting device at a transmission end. The belt tension adjusting device comprises an extruding type bearing seat, a belt wheel and a belt; a hollow accommodating groove is arranged in the extruding type bearing seat; a sliding piece is arranged in the accommodating groove in a sliding way; a wheel groove is arranged in the sliding piece; an interval for sliding and moving adjustment is arranged between the sliding piece and the accommodating groove; a bolt is locked and assembled between the sliding piece and the accommodating groove; a shaft hole is arranged in the sliding piece; the belt wheel is connected with a wheel shaft penetrating through the shaft hole and is pivoted in the wheel groove of the sliding piece; the belt is connected on the belt wheel; and the belt wheel controls sliding and movement of the sliding piece by use of the bolt to adjust the interval so as to control the tension of the belt.