At present， the phenomenon of network densification accelerates the degradation of channel transmission performance. And the widely used evaluation methods face significant challenges in evaluating channel transmission performance due to their limited consideration of parameters and constrained applicability. In response to the difficulties in evaluating channel transmission performance， a method for evaluating multi-parameter channel transmission performance through an improved Transmission Control Protocol/Internet Protocol （TCP/IP） frame structure was proposed. Firstly， the standardized test data was generated， including pseudo-random codes， basic curve data， and custom curve data， so as to ensure that the test data follow a uniform standard. Secondly， an improved TCP/IP frame structure was employed to package test data information， including total frame quantity and frame sequences， into the TCP/IP frames. In this way， the sending， receiving and parsing of test data were realized， and the statistics on basic channel transmission variables were completed， such as the number of frames by type， the number of frames by length， the total number of frames， and the volume of effective data. Finally， the received data were analyzed to obtain two types of high-level channel transmission information， namely frame error rate and bit error rate， completing the overall evaluation of the channel transmission performance. The designed method employed six parameters to evaluate channel quality， with the evaluation precision of the method reaching 0.01% and maintaining a minimum error margin of 0.01%. It is compatible with all communication channels using TCP/IP. Experimental results demonstrate that the proposed channel transmission performance evaluation method can perform the statistics and analysis of the six channel communication information， and evaluating the channel transmission performance accurately.