The invention discloses a durable dew-blocking-prevention combined-type exhaust gas waste heat utilization device which comprises a conduction oil casing type heat pipe exchanger, a pipe heat exchanger, a conduction oil pump, a steam pocket and an expansion groove. The expansion groove is provided with two inlets and an outlet. A conduction oil outlet formed in the conduction oil casing type heat pipe exchanger is connected with a conduction oil inlet formed in the pipe heat exchanger through a conduction oil pipeline. A conduction oil outlet formed in the pipe heat exchanger is connected with the first inlet of the expansion groove through a conduction oil pipeline. The outlet of the expansion groove is connected with a conduction oil inlet formed in the conduction oil casing type heat pipe exchanger through the conduction oil pump. A conduction oil bypass pipe is connected between the front end of the conduction oil inlet of the pipe heat exchanger and the second inlet of the expansion groove. A cooling water outlet II formed in the steam pocket is connected with a cooling water inlet I formed in the pipe heat exchanger. A steam outlet I formed in the pipe heat exchanger is connected with a steam inlet II formed in the steam pocket. Generated steam is provided for a user through a steam outlet of the steam pocket.