The invention discloses a door closer capable of self-locking and remote control, comprising a cylinder liner, a connecting pipe, a piston, a connecting rod, a right limit block, a first spring, a pull rod, an upper limit block, a lower limit block, and an electromagnetic switch , the second spring and the rotating shaft; the door closer of the present invention is designed with a self-locking device, so that after the door closer is self-locked, the door closing function becomes invalid, but at the same time, the damping effect is maintained, and the door with the door closer installed can be in any position , when a fire occurs, the fire door can be closed by remote fire control or manually triggering the self-locking device of the door closer, and the status is fed back to the fire control center at the same time; action, the fire door is closed. Secondly, when the door closer is self-locking, the fire door is in any state, which is convenient for people to use. Furthermore, unless the self-locking condition of the door closer is triggered, the door closer will not self-lock. In addition, the door closer still has a certain damping when it is self-locking, and the damping is adjustable.