A method and a device for testing an HDMI

The invention provides a method and a device for testing an HDMI (High Definition Multimedia Interface). The testing method includes the steps of connecting the testing device to a to-be-tested HDMI, wherein a plurality of control ports of a controller of the testing device are in tandem connection with a resistor through a drive circuit and then respectively connect to all differential signal pins in the HDMI, and an analog-digital converter is connected between the differential signal pins and the controller; outputting high level by each control port, detecting voltage values of every differential signal pin by the analog-digital converter and outputting the voltage values to the controller, and determining whether poor soldering or continuous soldering exists on each differential signal pin by the controller according to the voltage value of each differential signal pin. In the invention, the shortcomings of functional testing method can be made up by an open short circuit testingmethod and reading data from an EDID memory. The method and the device in the invention have advantages of convenient implementation and wide application.