The invention relates to a flexible easy-to-expand liquid crystal screen testing platform. The testing platform comprises a core control module, an eMMC module, a display output interface, an LCD power module, an external interface module, an external MCU module and an IO expansion and HMI interface; the core control module is the core of the whole system, controls all functions of the system and is composed of a CPU, a GPU and a DDR memory; the eMMC module is used for storing application programs and picture data; the display output interface comprises an RGB/LVDS output interface module and a display interface expansion module; the LCD power module is an expansion module; the external interface module comprises an Ethernet interface module, an SD card interface module, a USB interface module and a serial port module; an HMI interface module provides a human-computer interaction interface, and a user can set and monitor the system without using a PC. The platform is not a solution only for a display screen, but a universal testing platform, and the platform can support the needs of different customers and has high expandability.