Buffer device of electric cylinder

The utility model discloses a buffering device of an electric cylinder. The buffering device comprises the electric cylinder and a connecting column. Through cooperative use of the connecting column, the fixing block, the storage groove, the positioning mechanism and the transmission mechanism, the transmission mechanism drives the positioning mechanism to move, after the positioning mechanism moves to a proper distance, the connecting column is taken, replaced and pushed back to the transmission mechanism, and the positioning mechanism can fix the fixing block while resetting, so that the positioning efficiency is greatly improved. The connecting column replacement device solves the problems that when an electric cylinder is used in cooperation with other equipment in the prior art, a connecting column needs to be used for being connected with the other equipment, equipment of different models needs to use connecting columns of different models, and the connecting column replacement device is inconvenient to