The invention provides a multi-board card LTE gateway processing method based on ATCA hardware. The method needs to provide a multi-board card LTE gateway, wherein a switching board receives a message, if the message is an IP message, a service board receives the IP message, matches the information in the IP message with the information in a forwarding cache information table in the service board,forwards the IP message if the information is matched, and otherwise forwards the message to a main control board; if the message is a non IP message, the service board performs all-path forwarding on the message, and synchronizes the learnt forwarding cache information to the forwarding cache information table in each service board, the service board forwards the IP message according to the information in the forwarding cache information table, and otherwise, the main control board processes the message. The invention further provides a multi-board card LTE gateway processing system based onthe ATCA hardware. The service boards can communicate with each other, the data forwarding ability of the gateway is improved, the reliability of the product is improved, and the implementation costof the product is reduced.