The invention discloses a cloud platform connection port control device and control method, the device comprises a port control system, an upper detection communication system, a transmission system and a buffer storage system; the port control device carries out the grouping integration of multiple connection ports, carries out the unified management through a circuit, and strengthens the parallel processing speed of port data uploading. The upper layer detection communication system can carry out identification and packet transmission on long command data; the buffer storage system can temporarily store data generated due to accidental interruption and segmentation identification in the transmission process, and stability and safety in the whole data uploading process are guaranteed. Port unified management can be carried out on the multi-connection port device, the stability of multi-port data transmission is enhanced, data disorder caused by multi-channel data transmission is further solved through the data segmentation identification and buffer temporary storage method, and the stability and accuracy of data processing are enhanced.