The test-bed made of steel and wood is called steel wood test-bed. The steel wood structure test-bed consists of two structures: one is C-frame type and the other is H-frame type. C-frame is simple in structure, flexible and changeable, and can be combined at will; H-shape is dignified and generous, with good load-bearing performance. C-frame can be of suspended cabinet and push cabinet structure, which is convenient for installation and disassembly and is conducive to laboratory cleaning; The steel structure of H-frame makes the bearing capacity of the test bench reach more than 500kg, meeting the requirements of large precision instruments.