A method for transmitting signed data, comprising: obtaining a signing request data packet by an electronic signature token, wherein the signing request data packet comprises data to be signed; signing the data to be signed by the electronic signature token to obtain signed data; characterised by: obtaining a preset first transmitting strategy, obtaining first data to be transmitted according to a part of the signed data and the first transmitting strategy, and transmitting the first data to be transmitted by one time, or dividing the first data to be transmitted into multiple segments of first data and transmitting the multiple segments of first data by multiple times, by the electronic signature token; after obtaining the signing request data packet, extracting critical information of the data to be signed, and outputting the critical information of the data to be signed, by the electronic signature token; obtaining a confirmation instruction for the outputted critical information of the data to be signed by the electronic signature token; after obtaining the confirmation instruction, obtaining a preset second transmitting strategy, obtaining second data to be transmitted according to a remaining part of the signed data and the second transmitting strategy, and transmitting the second data to be transmitted by one time or dividing the second data to be transmitted into multiple segments of second data and transmitting the multiple segments of second data by multiple times, by the electronic signature token. obtaining a signing request data packet by an electronic signature token, wherein the signing request data packet comprises data to be signed; signing the data to be signed by the electronic signature token to obtain signed data; characterised by: obtaining a preset first transmitting strategy, obtaining first data to be transmitted according to a part of the signed data and the first transmitting strategy, and transmitting the first data to be transmitted by one time, or dividing the first data to be transmitted into multiple segments of first data and transmitting the multiple segments of first data by multiple times, by the electronic signature token; after obtaining the signing request data packet, extracting critical information of the data to be signed, and outputting the critical information of the data to be signed, by the electronic signature token; obtaining a confirmation instruction for the outputted critical information of the data to be signed by the electronic signature token; after obtaining the confirmation instruction, obtaining a preset second transmitting strategy, obtaining second data to be transmitted according to a remaining part of the signed data and the second transmitting strategy, and transmitting the second data to be transmitted by one time or dividing the second data to be transmitted into multiple segments of second data and transmitting the multiple segments of second data by multiple times, by the electronic signature token. obtaining a preset first transmitting strategy, obtaining first data to be transmitted according to a part of the signed data and the first transmitting strategy, and transmitting the first data to be transmitted by one time, or dividing the first data to be transmitted into multiple segments of first data and transmitting the multiple segments of first data by multiple times, by the electronic signature token; after obtaining the signing request data packet, extracting critical information of the data to be signed, and outputting the critical information of the data to be signed, by the electronic signature token; obtaining a confirmation instruction for the outputted critical information of the data to be signed by the electronic signature token; after obtaining the confirmation instruction, obtaining a preset second transmitting strategy, obtaining second data to be transmitted according to a remaining part of the signed data and the second transmitting strategy, and transmitting the second data to be transmitted by one time or dividing the second data to be transmitted into multiple segments of second data and transmitting the multiple segments of second data by multiple times, by the electronic signature token.