Payment method and device for multi-currency card

The invention discloses a payment method and device for a multi-currency card, and relates to the technical field of block chains, and the method comprises the steps: obtaining a plurality of customer categories based on the customer classification of a bank; constructing a risk space, wherein each dimension of the risk space is in one-to-one correspondence with the obtained customer category; based on the transaction data of each currency, determining the coordinate of the currency in the risk space; based on the transaction data of each transaction scene, determining the coordinate of the scene in the risk space; and for each scene, determining a plurality of supportable currencies corresponding to the scene according to the coordinate of each currency in the risk space and the coordinate of the scene in the risk space. According to the invention, the transaction risk of bank customers can be reduced. 本发明公开了一种多币种卡的支付方法及装置，涉及区块链技术领域，其中该方法包括：基于银行的客户分类，获得多个客户类别；构建风险空间，该风险空间的每个维度和获得的客户类别一一对应；基于每一币种的交易数据，确定该币种在风