The invention provides a system and a method for enhancing SSL data transmission performance. The system comprises a data compression module, a data dynamic encryption module and a network state monitoring and prediction module. The data compression module compresses the SSL data required to be transmitted and records the compression time of the SSL data. The network state monitoring and prediction module predicts the network state in the SSL data transmission process. The data dynamic encryption module dynamically adjusts the degree of parallelism of SSL data encryption according to the network state predicted by the network state monitoring and prediction module and the compression time recorded by the data compression module and transmits the encrypted SSL data to the network. The system and the method are applied to the situation of using the SSL protocol to perform safe transmission of big data so that the SSL data transmission performance can be enhanced.