Horizontal falling film water vapor generator

The invention relates to a horizontal falling film water vapor generator. The steam generation device solves the problem that in the prior art, a steam generation device is poor in steam generation efficiency and comprises a horizontal heat exchange barrel, a water inlet pipe and a water outlet pipe are arranged at one end of the heat exchange barrel, and a demineralized water inlet pipe is arranged on the upper side of the end, away from the water inlet pipe, of the heat exchange barrel; the two ends of the heat exchange water pipe assembly are connected with a water inlet pipe and a water outlet pipe correspondingly, a pressure-equalizing water distribution mechanism connected with a demineralized water inlet pipe is arranged at the upper end of the circumferential inner side of the heat exchange barrel, a vapor-liquid separation assembly is arranged on the upper side of the end, away from the demineralized water inlet pipe, of the heat exchange barrel, and an exhaust pressure release structure is arranged