NOVELTY - A device for regulating methanol solution consistency of direct methanol fuel cell based on diffusivity comprises pure methanol vessel (1) and pure methanol vessel (2) connected by connecting pipe (15); and pure methanol vessel (2) and methanol solution vessel (3) connected by separator; height control handle (5) is connected with one end of the level (6); spring material (13) at the bottom of methanol solution vessel (3); the level (6) is supported on the fixed bearing (7); the methanol solution vessel (3) is connected with the galvanic pile (9) through the conveying pump (12).    USE - A device is useful for regulating methanol solution consistency of direct methanol fuel cell based on diffusivity (claimed).    ADVANTAGE - The device for regulating methanol solution consistency of direct methanol fuel cell based on diffusivity has small volume, simple structure, and flexible control to the methanol solution consistency; and it dose not consume energy during operation.    DETAILED DESCRIPTION - A device for regulating methanol solution consistency of direct methanol fuel cell based on diffusivity comprises pure methanol vessel (1) and pure methanol vessel (2) are connected by connecting pipe (15); and pure methanol vessel (2) and methanol solution vessel (3) are connected by a separator; the piston (4) with the height control handle (5) is placed in the pure methanol vessel (2); the height control handle (5) is connected with one end of the level (6); the spring material (13) at the bottom of the methanol solution vessel (3) is connected with the other end of the level (6) through the fulcrum bar; the level (6) is supported on the fixed bearing (7); the methanol solution vessel (3) is connected with the galvanic pile (9) through the conveying pump (12); the conveying pipe (8) of the galvanic pile (9) is inserted in the methanol solution vessel (3); two edges of the galvanic pile (9) are respectively the positive pole (11) and the negative pole (10).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a device for regulating methanol solution consistency of direct methanol fuel cell based on diffusivity.    Pure methanol vessel (1)    Methanol solution vessel (3)    Piston (4)    Height control handle (5)    Level (6)