The invention discloses a cap screwing device for food filling bottles. The cap screwing device for the food filling bottles comprises a power distribution box, a sliding rod, a base, a cap screwing sliding frame, a sliding block, a buffering disc, a lifting disc, a transmission ring, a glue spraying disc, a clamping screw awl, a power connecting wire, an electric coil, a pulling rod, a turnover shaft, a spraying hole, clamping sliding plates, a resistance increasing plate, a sliding trough and a suction disc. The cap screwing device for the food filling bottles has the beneficial effects that the cap screwing sliding frame conducts cap screwing on the filling bottles by sliding on the sliding rod, and the high efficiency of work is ensured; people can change the working distances between the cap screwing sliding frame and the filling bottles by pulling and drawing the pulling rod up and down through the lifting disc according to the sizes of different filling bottles, so that cap screwing is conducted on the filling bottles more accurately, and the high accuracy of work is ensured; the cap screwing device can clamp and rotate screw caps through the two clamping sliding plates, and people can freely adjust the clamping distance between the two clamping sliding plates according to the different sizes of bottle caps of the filling bottles, so that it is ensured that the device can conduct cap screwing on the different filling bottles, and the universality of adaptation is ensured; and the device is convenient to operate, stable, firm and reliable, and connection of all components is flexible.