The invention relates to a heat treatment medium cleaning and reclamation device and a method thereof. A rinse tank is arranged below a conveyor chain of the device and is communicated with a water storage tank; an evaporation tank communicated with the water storage tank is arranged on one side of the water storage tank; and a shed roof is arranged outside a sewage reclamation device. The methodcomprises the following steps: sending the work pieces into the rinse tank in turn for rinsing after heat treatment; when the rinsing operation is completed, spraying and washing the work pieces; when salinity of the solution in the rinse tank is saturated, leading the solution into the water storage tank for reclamation; immersing a cloth curtain above the water storage tank into the salt solution in the water storage tank, then lifting the cloth curtain, and drying the cloth curtain in the air for natural volatilization; and when the brine in the evaporation tank begins to be crystallized, sending the solution to a crystallizer for crystallization. The cleaning and reclamation device has a simple structure and convention operation. The reclaimed medium can be reused, thereby reducing production cost, sewage treatment cost and environmental pollution. The cleaning and reclamation device is suitable for various middle and small enterprises.