A mobile-type stage light, comprising a guide track (1), a guide track car (2) slidingly connected to the guide track (1), an extension and retraction mechanism (3) mounted on the guide track car (2), and a stage light (4) and a gravity protection mechanism (5) mounted on the extension and retraction mechanism (3); the guide track (1) comprises a guide track body and an electrified guide rail (11) and a communication guide rail (12) arranged on the guide track body along the lengthwise direction of the guide track (1); the guide track car (2) comprises a car body (21), a movement mechanism (22), and an electrical conduction mechanism (23); the electrical conduction mechanism (23) comprises a first carbon brush assembly (231) and a second carbon brush assembly (232); the first carbon brush assembly (231) is in electrical contact with the electrified guide rail (11), and is electrically connected to the movement mechanism (22); the second carbon brush assembly (232) comprises a first brush group (2321) forming a communication connection with the extension and retraction mechanism (3), and a second brush group (2322) forming a communication connection with the stage light (4), the first brush group (2321) and the second brush group (2322) respectively being in electrical contact with the communication guide rail (12); the gravity protection mechanism (5) comprises a central processing unit, a gravity sensor, and a motor actuator; the central processing unit respectively forms a communication connection with the gravity sensor and the motor actuator. The present invention can avoid tangling caused by the guide track car (2) dragging and pulling wiring, and can further stop the guide track car (2) from moving when the stage light (4) is shaking.