The utility model discloses an automotive engine leak testing machine strutting arrangement contains a fixed base plate, fixed base plate on be equipped with a supporting substrate, the bottom four corners of supporting substrate on be equipped with one respectively and praise the cylinder, the top four corners of supporting substrate on be equipped with a locating pin respectively, the both sides of supporting substrate be equipped with a long banding fixed horizontal bar respectively, the both ends of fixed horizontal bar be equipped with a location round hole array that becomes by the setting circle punch combination respectively, the both ends of fixed horizontal bar between be equipped with a detachable clamping components respectively. During the use, user's directness is placed automotive engine on the supporting substrate to utilize four locating pin tops to go into the fixed slot of engine, simultaneously, two die clamping cylinder start, and the cylinder head supports on the setpoint of engine. Last, praise the cylinder and start, on whole engine rises to the test point, insert the survey test tube mouth of engine with the test oil circuit of outside on, the test is convenient.