Static electricity protection circuit, display panel and display device

The invention discloses a static electricity protection circuit, a display panel and a display device. When the amount of static electricity on a signal line on the display panel reaches a certain degree, the static electricity can be timely released through a second signal end of the static electricity protection circuit, so that a static electricity damage to the panel is avoided; when the display panel needs to be subjected to Cell Test, a required signal for the test is input into a first signal end by the second signal end through controlling a test control signal end, so that the function of the Cell Test can be achieved. Compared with an existing display panel in which the static electricity protection circuit is designed and a Shorting bar is also designed, the display panel disclosed by the invention has the advantages that the functions of static electricity protection and Cell Test can be achieved only by one circuit, so that the wiring space can be reduced; and the step of removing a Shorting bar region in the prior art is also omitted.