The utility model provides a special hoisting trolley of flowmeter is four wheeled leg truss structures, four train (1) being equipped with brake (2) are located the bottom of four supporting leg (6),it rotates movable joint (3) respectively to be equipped with one between train (1) and supporting leg (6), two liang of hookups around sheer pole (4) are passed through to four supporting leg (6) lower parts, respectively be equipped with in the middle of four supporting leg (6) one expansion plate (5), the hookup is sealed through well stull (8) in four supporting leg (6), the lower part of stull (8) respectively is equipped with two bracings in the four sides, form triangle -shaped with supporting leg (6), the hookup is sealed through last horizontal pole (9) in the top of four supportingleg (6), and form the rectangular pyramid frame through four sloping (10), establish lifting hook (11) in the rectangular pyramid frame top.