The invention discloses a mobile data transmission method based on combination of SD (Secure Digital) encrypted card and a short-distance wireless communication technology, belonging to the field of communication. The method comprises the steps of: 1, acquiring consumption amount information; 2, checking whether the expense exceeds a micropayment limit, if so, skipping to a step 3, and if not, skipping to a step 4; 3, logging in a mobile terminal bank, and skipping to a step 5; 4, checking whether the micropayment remaining balance is sufficient or not, if so, skipping to a step 6; and if not, skipping to the step 3; and 5, carrying out business process by the mobile terminal bank, or step 6, carrying out micropayment and then completing the payment. The invention can effectively solve capitals floating on various cards so as to ensure that not only a certain interest income can be obtained on a bank card, but also the consumers are facilitated. Thus, a bank can cooperate with a mobile terminal operator for disintermediation so that the capital of the bank directly enters end consumption, a consumption information stream directly enters information system of the bank and information processing becomes more efficient.