Pre-pressing tool and pre-pressing construction method

The invention relates to the technical field of bridge construction, in particular to a pre-pressing tool and a pre-pressing construction method.The pre-pressing tool comprises a bracket assembly and a counter-pressing beam assembly, the bracket assembly comprises a first bracket, a second bracket, an inclined support, a supporting component and a counter-force lifter, and the first bracket and the second bracket are distributed on the two symmetrical sides of a pier body correspondingly; the first bracket and the second bracket are connected with the pier body through embedded parts, the first bracket is located above the second bracket, the supporting component is located above the first bracket, the inclined support is connected with the supporting component and the second bracket, the counter-force lifter is located above the supporting component, and the counter-pressure beam assembly is located above the counter-force lifter; the counter-force lifter is started to pressurize the counter-pressure beam as