The present invention discloses an energy-saving single-effect concentrator for chemical production, and the energy-saving single-effect concentrator comprises an evaporator, an electromagnetic reversing valve, a first vapor-liquid separator, a condenser, a liquid collecting tank, a water tank, a steam-generating tank and a heater. The top of the water tank is fixedly provided with the steam-generating tank, the heater, the evaporator and the liquid collecting tank in sequence from left to right. Inside of the water tank is fixedly provided with a separating board, which divides inside of thewater tank into a steam water tank and a cooling water tank. The steam water tank is located on the left side of the cooling water tank. A second submersible pump is fixedly installed at the inner bottom end of the steam water tank, and a first submersible pump is fixedly installed at the inner bottom end of the cooling water tank. Two sets of electric heating plates are fixedly installed inside the steam-generating tank, and the inner bottom end of the steam-generating tank is fixedly provided with a shower plate. The energy-saving single-effect concentrator for chemical production is reasonable in design and stable in system, improves steam utilization efficiency, provides convenience for later maintenance and repair, and is worth promoting.