Compressive stress fatigue testing machine for lattice structure material

The invention discloses a compressive stress fatigue testing machine for a lattice structure material. The compressive stress fatigue testing machine comprises a chassis, and a loading device, a sliding device and cam shaft driving assemblies which are installed on the chassis, wherein two groups of cam shaft driving assemblies are coaxially arranged and mounted in the middle of the chassis; testassemblies are symmetrically arranged on the two sides of each group of cam shaft driving assemblies, each test assembly comprises a loading device and a sliding device, a lattice structure sample isarranged between the loading device and the sliding device, cameras are arranged beside lattice structures, and the cameras are fixed to the chassis through using camera supports; and a motor is arranged at one end of the two groups of cam shaft driving assemblies which are coaxially connected, a blocking piece is arranged at the other end of the two groups of cam shaft driving assemblies, a photoelectric switch is arrange