Reusable dropping sequence controller

The invention discloses a reusable dropping sequence controller comprising a bracket, an injection device, a locking device and a sequence control device arranged on the bracket in turn; An injectiondevice comprising a plurality of drip bottles and an integrated catheter; A locking device comprising a plurality of control pins, a plurality of locking buckles and a mounting plate; A sequence control device comprising a rotating block, a slider, a push rod and an electric motor; The slider is in the shape of a strip and comprises a first head part and a second head part. The first head part isprovided with a third pin hole and the second head part is provided with a fourth pin hole. The rotating block comprises a first ring and a second ring, wherein a sliding groove for sliding the sliding block is formed on the outer circular surface of the first ring, and the second ring is fixedly connected with the first ring; The second head of the slider and the first head of the push rod are hinged by a second pin, the