The present disclosure provides a data transmission method for Mesh network, a data transmission apparatus for Mesh network, a gateway and a storage medium, belonging to technical field of wireless communications. The method includes: parsing data to be transmitted sent from a source device to obtain an identifier of a target device of the data to be transmitted; querying, according to the identifier of the target device, an optimal path from the gateway to the target device from the preset routing table; and sending the data to be transmitted and the optimal path to a relay device connected to the gateway on the optimal path.