Disclosed are a data transmission method, a device, a terminal, and a computer-readable storage medium. The method comprises: acquiring performance information of terminals in a direct communication cluster, the terminals in the direct communication cluster having established direct communication connections to the first terminal; determining a second terminal on the basis of the performance information; transmitting to the second terminal via a second direct communication connection established with the second terminal target data in data to be transmitted; transmitting instruction information to the second terminal or a target terminal, the instruction information being used for instructing the second terminal to establish a direct communication connection with the target terminal in the direct communication cluster and instructing the second terminal to transmit the target data with the target terminal. The employment of the present application implements collaborative data transmission by multiple terminals, thus increasing data transmission efficiency, and facilitating the transmission of data.