The invention discloses a climbing arm robot with V-shaped permanent magnetic chain sheets and an air rod buffering mechanism so as to solve the problems that existing water wall robots move and climb inflexibly. An air rod buffering connecting mechanism comprises two sets of crossed air rod assemblies, and each set of the crossed air rod assembly comprises two air rods which are arranged in a crossed mode; the two sets of crossed air rod assemblies are arranged in an up-down mode, and shells of the four air rods are formed into a rhombus; the upper air rod shell and lower air rod shell on the left side are hinged to a left main frame body through a first pin, and the upper air rod shell and lower air rod shell on the right side are hinged to a right main frame body through a first pin; an inner rod of each air rod is hinged to a corresponding fixed piece through a second pin, and each fixed piece is fixedly installed on a corresponding connecting rod, and a probe supporting mechanism is fixedly installed on each driven wheel fixing frame; a plurality of V-shaped brackets are uniformly distributed on each trapezoid synchronous belt, V-shaped openings of the V-shaped brackets directly face the length direction of the trapezoid synchronous belts, and a magnetic block is arranged on the inner wall of the V-shaped sheet of each V-shaped bracket. The climbing arm robot with the V-shaped permanent magnetic chain sheets and the air rod buffering mechanism is used for water wall inspecting.