A gas proportional valve, comprising a body, a first valve port, a second valve port and an electromagnetic driving device, wherein the electromagnetic driving device comprises a fixed iron core, a first sleeve portion, a first core body assembly, a second core body assembly, a first elastic member and a second elastic member; wherein the first core body assembly comprises a first movable iron core, a second sleeve portion and a first sealing portion; the second sleeve portion is fixedly or position-limitedly connected to the first movable iron core; a lower end of the second sleeve portion is fixedly or position-limitedly connected to the first sealing portion, the first elastic member abuts against the first sealing portion, the second core body assembly comprises a second movable iron core and a second sealing portion; a lower end of the second movable iron core is fixedly or position-limitedly connected to the second sealing portion; a recess is defined on the first movable iron core and/or the second movable iron core; at least part of the second elastic member is located in the recess, one end of the second elastic member abuts against the first movable iron core, and another end of the second elastic member abuts against the second movable iron core; when the electromagnetic driving device is energized, the first movable iron core is configured to move upward axially along a first sleeve wall of the first sleeve portion with the second sleeve portion and the first sealing portion, so that the first sealing portion moves away from the first valve port, the second movable iron core moves away from the second valve port with the second sealing portion, and the first movable iron core abuts against the second movable iron core, and the first movable iron core and the second movable iron core move close to the fixed iron core; and when the electromagnetic driving device is de-energized, the first sealing portion is configured to close the first valve port and the second sealing portion is configured to close the second valve port, a first spacing is formed between the first movable iron core and the second movable iron core, a second spacing is formed between the first movable iron core and a closed end of the first sleeve portion, and the first spacing is smaller than the second spacing. wherein the first core body assembly comprises a first movable iron core, a second sleeve portion and a first sealing portion; the second sleeve portion is fixedly or position-limitedly connected to the first movable iron core; a lower end of the second sleeve portion is fixedly or position-limitedly connected to the first sealing portion, the first elastic member abuts against the first sealing portion, the second core body assembly comprises a second movable iron core and a second sealing portion; a lower end of the second movable iron core is fixedly or position-limitedly connected to the second sealing portion; a recess is defined on the first movable iron core and/or the second movable iron core; at least part of the second elastic member is located in the recess, one end of the second elastic member abuts against the first movable iron core, and another end of the second elastic member abuts against the second movable iron core; when the electromagnetic driving device is energized, the first movable iron core is configured to move upward axially along a first sleeve wall of the first sleeve portion with the second sleeve portion and the first sealing portion, so that the first sealing portion moves away from the first valve port, the second movable iron core moves away from the second valve port with the second sealing portion, and the first movable iron core abuts against the second movable iron core, and the first movable iron core and the second movable iron core move close to the fixed iron core; and when the electromagnetic driving device is de-energized, the first sealing portion is configured to close the first valve port and the second sealing portion is configured to close the second valve port, a first spacing is formed between the first movable iron core and the second movable iron core, a second spacing is formed between the first movable iron core and a closed end of the first sleeve portion, and the first spacing is smaller than the second spacing.