The invention relates to a solar-assisted absorption refrigeration device for a refrigerated truck. The solar-assisted absorption refrigeration device comprises a first heat supply system, a second heat supply system and a refrigeration system; the refrigeration system is connected with the first heat supply system and the second heat supply system through wires and pipelines correspondingly; the first heat supply system comprises a solar cell panel, a controller and a storage battery; the second heat supply system comprises an engine water tank, a circulating water pump and an adjusting valve; and the refrigeration system comprises a generator, a condenser, a heat exchanger, an evaporator, an absorber, an expansion valve, a solution pump and a throttling valve. The bottom of the generator is provided with a heater band. According to the solar-assisted absorption refrigeration device for the refrigerated truck, refrigeration cycle in a compartment of the refrigerated truck is completed by reasonably using engine waste heat and the solar power generation technology, and the refrigeration device is simple in structure, easy to achieve, environmentally friendly and free of pollution; in addition, the solar-assisted absorption refrigeration device still can refrigerate the interior of the compartment of the refrigerated truck when the refrigerated truck stops in the halfway or stops at night, the delivery range of the refrigerated truck is expanded, the limitation that the refrigerated truck needs to be connected with an external power source when stopping is eliminated, and the solar-assisted absorption refrigeration device can refrigerate the compartment all the time.