Device for heating sand in sand reservoir arranged on sand mixing machine

The utility model relates to a device for heating sand in a sand reservoir arranged on a sand mixing machine. The device comprises a ringlike pipe, wherein the ringlike pipe is arranged on the inner wall of the sand reservoir; and one end of the ringlike pipe is connected with a water outlet pipe of an electric furnace, and the other end of the ringlike pipe is connected with a water pipe of the sand reservoir. The device for heating sand in the sand reservoir arranged on the sand mixing machine is easy to manufacture, has low cost and is used for heating the sand in the sand reservoir arranged on the sand mixing machine by using the water heat of the coil of the electric furnace; and by using the device, the sand temperature in winter can be increased by 20 DEG C.