Abstract: At present, Owing to lack of equipment characterized by tube upgoing prevention and string reverse compression at wellhead during the downhole oil gas testing procedures, a piece of new equipment with tube upgoing prevention and reverse compression was introduced in this paper. The apparatus settle the above problem by counter compression principle and general tools. We used a more firm and more convenient nut to fix the tube in order to prevent the upgoing, meanwhile, this kind of structure was more suitable for different protrude height of tube at the wellhead. Instead of pressure by wire ropes tightening in the past, we adopted compression controlling using a lifting jack. Both of the technologies have been successful applied at field, and the results were very well.