The invention provides a solid state hard disk device with a warning device and a relevant solid state hard disk control circuit. The solid state hard disk device comprises a communication interface, a solid state hard disk and the solid state hard disk control circuit, wherein the communication interface performs data communication with a main control device; the solid state hard disk comprises one or a plurality of flash memory arrays; the solid state hard disk control circuit comprises a control interface and a flash memory control circuit. After the solid state hard disk control circuit is electrified, if the flash memory control circuit cannot perform data communication with the main control device through the communication interface, or the flash memory control circuit detects the condition that present events occur in the solid state hard disk, the flash memory control circuit can control the warning device to generate preset sound or preset light rays or the combination of the preset sound and the light rays through the control interface so as to send out warning to a user of the solid state hard disk device.