The utility model provides a large -scale transmission tower suction formula bucket foundation structure, it includes an at least suction formula bucket foundation utilizes in the bucket vacuum?negative?pressure to sink in the ground of network of waterways marsh, has pour the barrel top platform on this suction formula bucket foundation upper portion to pre -buried on this barrel top platform have a ring flange, and at least one of a transmission tower lower part is connected bottom of a matter portion flange and is passed through bolted connection with the ring flange and form wholly, the construction method be: the suction formula bucket foundation that a) will prefabricate arrives at the scene to, forms a sealed barrel -shaped structure, B, ) treat that the installation finishes, invert the design tower position hoist on the appointed soft soil layer with suction formula bucket foundation with lifting device such as hoists, let suction bucket certain degree of depth of sinking in advance under the dead weight condition, C, ) then with the vacuum apparatus of bleeding, suction bucket takes bucket normal water and air out from covering an aspirating hole to form the negative pressure in the bucket, D, ) treat that a barrel base reaches predetermined elevation after, the construction of bucket base is accomplished promptly to the negative pressure in the release bucket.