The invention provides a novel real time efficiency testing table and testing method for a high-low temperature non-linear mechanism, relates to a real time efficiency testing table and testing methodand specifically relates to the novel real time efficiency testing table and testing method for the high-low temperature non-linear mechanism. The invention aims to solve a problem of incapability ofaccurate acquisition of characteristics of real time efficiency and the like of a mechanism through regular tests. According to the invention, the testing table includes two linear loading and measurement sub systems, two tolerance adjustment sub systems, a drive and measurement sub system and a high-low temperature environment box. The to-be-tested mechanism is disposed in the high-low temperature environment box. The drive and measurement sub system is connected with the high-low temperature environment box. The two tolerance adjustment sub systems are arranged on two sides of the to-be-tested mechanism symmetrically. The two linear loading and measurement sub systems are mounted on the two tolerance adjustment sub systems respectively. The invention belongs to the field of mechanical engineering.