The invention relates to a portable protection screen debugging laptop support device and a use method, and belongs to the field of electrical equipment related technologies. The device part mainly comprises a bracket, and sliding tracks are movably installed on the two sides of the bracket. Each sliding track comprises a sliding block and a sliding rail in sliding fit with the sliding block, and buckles are installed at the ends of the sliding blocks and are plugged in outer frame holes of a transformer substation protection screen through plugs on the buckles. Through the design of the bran-new structure, the device can well assist a worker in debugging the transformer substation internal protection screen and/or a communication screen and is quite convenient to use.