The utility model discloses a deep ultraviolet doubling of frequency testing arrangement belongs to optical nonlinearity frequency change technical field, and this testing arrangement includes: lightsource (1) sets up in airtight darkroom (2) outside entrance, and it sends the ultraviolet ray and enters into formation light path in airtight darkroom (2), airtight darkroom (2) are the vacuum or fill the darkroom of nitrogen gas, in the light path of setting in airtight darkroom (2) of sample frame (3) activity, sample storehouse (4) set up in one side and the position that sample frame (3) corresponds of light path, and it has one or more samples to hold, sample control lever (5) one end is connected with sample frame (3), and the other end stretches out airtight darkroom (2), and controlsample frame (3) removes between sample storehouse (4) and light path. The utility model discloses a purpose that the replacement sample need not to begin to speak in airtight darkroom (2) has been realized in sample frame (3) and sample control lever (5) that the activity set up, and measuring error is little, has guaranteed the repeatability and the comparativity of test result.