The invention relates to a segmented independent transmission check method, comprising the following steps: S1, data to be downloaded to a control station by an engineer station is segmented into a plurality of Ethernet data packets; S2, when sent, the data in a dual-port random access memory (RAM) is fetched and coded for checking; S3, data packet serial number check and cyclic redundancy check (CRC) are performed on the received data by the control station when the control station is receiving data; S4, after all of the abovementioned work is performed successfully, the engineer station is notified by the control station via the Ethernet that the data is successfully received; and S5, if S3 fails, the current state and fault information of the control station is sent back by the control station and timely operation is performed by the engineer station according to the feedback information of the control station; if errors occur in the data packet serial number check or CRC, the current data packet is resent by the engineer station; if the fault information of the control station is received, the downloading operation is suspended; and if CRC errors or communication timeouts occur successively, it is indicated that a fault occurs in a communication link or in the control station. The segmented independent transmission check method provided by the invention has the advantages of high certainty and reliability without the tedious handshaking mechanism and thus improves the efficiency of data transmission.