CH395 is an integrated TCP/IP protocol stack of domestic Ethernet controller chip,for the ordinary singlechip expansion based on CH395 Ethernet communication function to provide the measured communication rate reference,In this paper, the C8051F340 singlechip expansion CH395, for example, gives a simple CH395 network communication rate test program.The program on the hardware selection C8051F340 onchip peripherals in the hardware resources less and faster SPI interface and CH395 interconnection to achieve network data interaction, In the software on the microcontroller C8051F340 directly through the command to call CH395 comes with the library function and the use of CH395 builtin TCP/IP protocol stack to configure the microcontroller as a server, with the LabVIEW host computer to do with its data communication.In the test program in the two test methods and a number of experimental data show that the data in the SPI mode, singleshot and singleshot without losing data in the case of the average speed can be stable to 200 KB/s.