The invention discloses a reverse-phase demulsifier dosing device, comprising a storage box, the storage box is fixedly connected with a partition, the storage box is provided with a cavity, and the cavity is separated by the partition to store water chamber and reverse-phase demulsifier storage chamber, the water storage chamber is located above the reverse-phase demulsifier storage chamber, the partition is provided with an installation chamber, the installation chamber is provided with a motor, and both sides of the motor are provided with There is a reinforcement device, the output end of the motor is provided with a stirring device, and the surface of the storage box is provided with a plurality of observation devices. In the present invention, by pushing the push rod, the protrusion squeezes the inner wall of the groove, so that the sliding block slides in the spring groove, the second spring is compressed, and at the same time, the arc surface extrusion block squeezes the spherical block, so that the first spring is compressed, and the spherical block is downward. In the process of moving, increase the water output of the first pipeline and reduce the output of the demulsifier in the second pipeline, so as to dilute the demulsifier before putting it in, so as to dilute it while putting it in.