The invention relates to a novel absorption type refrigeration device for fishing boats. The device comprises a generator and an absorber, and is characterized in that a circulating pipe is formed between the generator and the absorber through an input pipeline and an output pipeline; a heat exchanger is arranged on the input pipeline and the output pipeline; a pressure regulating valve is arranged on the output pipeline between the absorber and the heat exchanger; a solution pump is arranged on the input pipeline between the absorber and the heat exchanger; the generator is sequentially connected with a condenser, a gas-liquid separator, a refrigerating chamber, an injector, an evaporator condenser II and the absorber through a pipeline; and a throttling valve is arranged on a pipeline Ibetween the gas-liquid separator and the refrigerating chamber. The novel absorption type refrigeration device for the fishing boats provided by the invention has the beneficial effects that through the combination of driving through waste heat of an engine and replacing the throttling valve with the injector, the problem of electric drive energy consumption is solved; and meanwhile, a mixed refrigerant carries out auto-cascade cycle so as to produce the low temperature ranging from minus 20 DEG C to minus 30 DEG C required for refrigerating fishes, so that the device is energy-saving and environmentally-friendly, and has a better social benefit.