The invention belongs to the field of mechanical equipment and discloses a casing machine. The casing machine comprises a carton box opening and grating loading device, a box partitioning plate grasping and conveying device, a box sealing mechanism, a clamped bottle casing device, a carton box opening device, a conveying belt, a carton box bin and guardrails. The left side of the carton box opening and grating loading device is fixedly connected with the box partitioning plate grasping and conveying device; the box sealing mechanism is fixedly installed on the front side of the carton box opening and grating loading device; the clamped bottle casing device is fixedly installed on the front side of the box partitioning plate grasping and conveying device; and the carton box opening device is fixedly installed on the left side of a box grating moving mechanism. Through the carton box opening and grating loading device, the box partitioning plate grasping and conveying device, the box sealing mechanism, the clamped bottle casing device and the carton box opening device, the automatic casing procedure can be achieved, a large amount of labor and cost are saved, using is convenient, operation is easy, and high practicability and generalization performance are achieved.