The invention discloses a chemical condenser which comprises a base, fixing holes, a cooling shell, a mounting base, a liquid inlet pipe, a liquid outlet pipe, a water inlet pipe, a water outlet pipe and a connecting assembly. The fixing holes used for fixed mounting are formed in the two sides of the surface of the base, the cooling shell is mounted on one side of the upper end of the base, and the cooling shell is in a U shape; the water inlet pipe and the water outlet pipe are arranged at the two ends of one side of the cooling shell correspondingly, penetrating holes are formed in the two ends of the cooling shell correspondingly, and a flow guide assembly is arranged in the cooling shell, so that the flowing speed is conveniently controlled and adjusted; by rotating a rotating sleeve, the rotating sleeve drives a connecting ring to rotate, the connecting ring drives a mounting screw sleeve to rotate through a meshing tooted bar and a meshing gear; and the mounting plate moves along the surface of the mounting bolt along with rotation of the mounting screw sleeve, so that the mounting plate moves towards the interior of the mounting base, and quick mounting of the mounting plate and the heat exchange assembly is facilitated.