Message transmission method, message processing method and device

The invention provides a message transmission method, a message processing method and devices thereof, which can be applied to the technical field of information processing or the field of financial science and technology. The message transmission method comprises: obtaining a plurality of messages to be transmitted, the plurality of messages to be transmitted being obtained according to a piece of complete transmission information, and each message to be transmitted being configured with a first mark area; a plurality of messages to be transmitted are divided into a first to-be-transmitted message set and a second to-be-transmitted message set, and a first mark area of the messages to be transmitted in the first to-be-transmitted message set has a first preset identifier; performing conversion processing on each to-be-transmitted message in the first to-be-transmitted message set by using the target encryption program to obtain an encrypted message set; and transmitting the encrypted message set and the seco