Off-line connecting device of roll-shaped prepreg

The utility model provides an off-line connecting device of a roll-shaped prepreg, which comprises a frame, an automatic reeling driving unit installed on the frame, a tension adjusting system and a length counting unit. The automatic reeling driving unit comprises a reeling expanding shaft and a driving motor installed on the frame at one end of the reeling expanding shaft; the tension adjusting system comprises an unreeling expanding shaft and a magnetic powder brake installed on the frame at one end of the unreeling expanding shaft; and the length counting unit comprises a counting roller installed on the frame and positioned at the middle below the reeling expanding shaft and the unreeling expanding shaft, a length counter sensor installed on the counting roller, and a length display arranged above the reeling expanding shaft. The off-line connecting device can realize off-line connection, to ensure that the stored adhesive sheets meeting index form commercial sheets through connection, and reduces the hu