1. Waste lithium battery recycling and treatment system, including waste lithium battery recycling and treatment device and exhaust gas treatment device, waste lithium battery recycling and treatment device includes lithium battery recycling pre-treatment shredding device, pyrolysis device, lithium battery recycling post-treatment (including secondary crushing and grinding and wind selection equipment) device connected in sequence; pyrolysis device includes pyrolysis furnace and frequency conversion air volume control device, connected in sequence with the production of pre-treatment device, Dry rotary furnace integration, post-treatment device, dry rotary furnace firing exhaust port three-dimensional connection pre-treatment shredding device outlet and production of environmental protection devices; pyrolysis furnace cracking exhaust gas outlet and environmental protection devices; In addition, in order to solve the waste lithium batteries dry recycling and treatment of high energy consumption, this complete set of equipment also adopts the following preferred way: the pyrolysis device also includes an external heat exchanger, external heat exchanger is installed in the outer side of the pyrolysis furnace; external heat exchanger air inlet connected to the environmental protection device; the external heat exchanger air inlet connected to the environmental protection device. The air inlet of the heat exchanger is connected to the high temperature flue gas discharge port of the environmental protection device; the connecting pipeline between the cracking exhaust gas outlet of the pyrolysis furnace and the environmental protection device is equipped with an insulating sleeve; one of the branch pipes is connected to the air inlet of the external heat exchanger, and the branch pipe is equipped with a flow regulating device at the high temperature flue gas discharge port; the exhaust gas produced by the high temperature pyrolysis furnace enters into the external heat exchanger of the pyrolysis device through the high temperature flue gas discharge port of the environmental protection device and the connecting pipeline. The waste gas from the high-temperature pyrolysis furnace enters the external heat exchanger of the pyrolysis device through the high-temperature flue gas discharge port of the environmental protection device in combination with the connecting pipeline, and is used as the heat source of the pyrolysis furnace.