The present invention provides a detection method of a set-top box panel. The present invention installs a detection interface connected between a main chip of a set-top box and a display module of a panel to be detected, the detection interface is provided with a shift register and eight test scanning wires, and the eight test scanning wires are then respectively connected with eight sections of multiplex interfaces of a four-bit LED digital tube of the display module of the panel to be detected. During the detection, an input pulse is given to the clock bit of the shift register so that the pulse can be output at the digital bit, the main chip is used for controlling the shift register, the eight-bit data represented by each bit of the four-bit LED digital tube is sent to the corresponding digital tube bit through scanning wires, and the detection results of the panel are judged through two states: the turning-on state and the turning-off state of the LED of the four-bit LED digital tube. Through the method of the invention, unqualified set-top box panels can be detected for ensuring the qualified product rate of products.