Abstract: In the Materialism and Empiriocriticism, Lenin clearly put forward the concept of “idealism in physics” from two basic philosophical lines of division of two factions: the crisis and revolution of physics, attributed the commonness of philosophy of Mach, Poincare, Duhem, Ostwald and Pearson to “idealism”, and officially named “the ‘Physics’ Idealism School”. Li Xingmin, a Chinese scholar, put forward a new classification criterion in the 1980’s, that is the “Mechanics School” or “Mechanical School” and “Critical School.” “Critical School” and “‘Physics’ Idealistic School” referred to the same persons, but the starting point and goal of philosophy diametrically opposed. “Schools of Criticism” was proposed, launched a study of five representative of the “School of Criticism”, effectively promoted the change of understanding on this issue.