The invention discloses an absorption type thermal converter which comprises a first generator, a condenser, an evaporator, an absorber, a first solution heat exchanger, a front absorber, a second generator, a second solution heat exchanger, a third solution heat exchanger, an evaporation preheater, a first absorbing preheater, a second absorbing preheater, a pump, a valve and a pipeline. The pump, the valve and the pipeline are connected with the containers. The absorption type thermal converter has the advantages that by adding the second generator and the three preheaters, the coolant steam yield and the low-temperature heat energy using rate are improved, accordingly, system heat efficiency is improved, and by adding the front absorber, the second solution heat exchanger, the third solution heat exchanger and related parts, system temperature rising range is improved. In addition, the operation working condition range in which the absorption type thermal converter operates efficiently is relatively wide, and good application prospect is achieved.