The invention provides a solar energy ammonia absorption tower. The solar energy ammonia absorption tower comprises N groups of lens focusing clusters, an intelligent control center, a boiler, and a one-way conducting valve. High-temperature high-pressure superheated steam enters a thermal insulation tank to pass an thermal insulation buffer tank, a heat supply center, an ammonia absorption tower body, a thermal insulation connecting pipe, and an information connecting wire; each of the lens focusing clusters is a group of focusing lens group which is perpendicular to solar rays and synchronously rotates along with the solar rays; the focusing lens focuses the heat gathering center of the boiler at all time; when water temperature and pressure in the boiler achieve certain values, the one-way conducting valve is switched on, and the superheated steam enters the next boiler for heating further; and when the temperature and the pressure are reduced to certain values along with the output of the superheated steam, the one-way conducting valve is switched off, and the step is repeated, so that the superheated steam with high temperature and high pressure can be produced, and finally, the superheated steam enters the thermal insulation tank through an one-way conducting valve VIII to be used in the thermal insulation buffer tank, an ammonia and steam absorbing and mixing tank, and an ammonia and water absorbing tower. The solar energy ammonia absorption tower disclosed by the invention has the advantages of being high-efficient, environmentally-friendly, energy-saving, emission-reducing, cost-saving, and free from pollution.