Heat conductivity coefficient detection device suitable for insulation boards of various specifications

The utility model relates to a heat conductivity coefficient detection device suitable for insulation boards of various specifications. The heat conductivity coefficient detection device comprises a detection box, a cold plate, a hot plate, a side positioning plate, a lateral cylinder and a pressing cylinder, a downward-pressing air cylinder is fixed to the center of the upper wall of the detection box, a piston rod of the downward-pressing air cylinder is connected with a pressing push plate, guide rods are arranged at the four corners of the pressing push plate respectively and penetrate through the pressing push plate, and the lower ends of the guide rods are connected with a fixing plate; a cold plate is fixed below the pressing push plate, and a temperature adjusting device and a first temperature sensor are arranged in the cold plate; the fixed plate is arranged at the bottom of the detection box, a hot plate is arranged above the fixed plate, and a heating device and a second temperature sensor are arr