Your 1st post description is different then the second, 1st post you say it is cold air, short cycle, it sounds some thing is wrong.
However. The 2nd post description "感觉风和以前比,没有那么热了,但用气量非但没减少,反而增多了" sounds normal. New furnace has New Motor. New Blower, it have more power to move air into the room, when there is more air volume pass through the furnace heat exchange, then more heat will be carry away, if the burner burning only small amount of gas which the burner may not have enough time to created more BTU, that is why you feel the air is not as hot as the old one
However. The 2nd post description "感觉风和以前比,没有那么热了,但用气量非但没减少,反而增多了" sounds normal. New furnace has New Motor. New Blower, it have more power to move air into the room, when there is more air volume pass through the furnace heat exchange, then more heat will be carry away, if the burner burning only small amount of gas which the burner may not have enough time to created more BTU, that is why you feel the air is not as hot as the old one