The invention provides a data transmission method and apparatus, a device and a storage medium. The method is applied to a wireless power cable communication device. The wireless power cable communication device can establish a power cable link and a wireless link. The method comprises the steps of determining whether a power cable link condition is met, wherein the power cable link condition refers to a condition of data transmission through the power cable link; if the power cable link condition is not met, determining whether a wireless link condition is met, wherein the wireless link condition refers to a condition of data transmission through the wireless link; and if the wireless link condition is met, transmitting data through the wireless link. Through adoption of the data transmission method and apparatus, the device and the storage medium, the data transmission rate is improved.