Test system and test method for steel strip heating

The invention relates to a test system and a test method for heating a steel strip, a test device is accommodated in a box body, an air inlet pipe and an air outlet pipe of a pressurizing device penetrate through the outer wall of the box body and are inserted into a shell of the test device, and a cooling circulation device is communicated with the box body; a containing cavity is defined by the shell, the top end of the containing cavity is covered with a sealing cover plate, a high-pressure liquid medium is contained in the containing cavity, the top end of the heater makes contact with the pressure assembly through an elastic piece, and the elastic piece is in a compressed state. The two pulling assemblies are arranged on the two opposite sides of the shell respectively, the two opposite ends of a to-be-tested steel belt are connected with the insertion ends of the two pulling assemblies respectively, and the bottom end of the heater abuts against the top face of the to-be-tested steel belt; the method co