Seal assembling device

The utility model provides a seal assembling device which comprises a machine frame, a movable tool capable of containing a seal and a vertical block located on the rear side of the movable tool are arranged at the upper end of the machine frame, a first air cylinder is vertically and downwards arranged on the vertical block, the end portion of a piston rod of the first air cylinder is connected with a guide plate matched with the movable tool, and the end portion of the piston rod of the first air cylinder is connected with the guide plate. The guide plate can place the sealing line into a sealing line hole of the seal, the rack is provided with a limiting block and a second air cylinder, the limiting block is used for limiting the locking key, and the end of a piston rod of the second air cylinder is connected with a push block used for pushing the locking key into the corresponding seal. The automatic sealing device has the advantages that the sealing line can be automatically placed in the through hole of