Abstract thrombus filter and method of use thereof In the field of blood vessel filters, a thrombus filter comprising a sheath (1), a thrombus retention net (2) with a retention port, a first piece is disclosed in the field of blood vessel filters. feed (4) and a control handle. The thrombus filter is also provided with a prevention umbrella (3), wherein the direction of opening of the overflow prevention umbrella (3) is identical to the direction of the retaining door. the overflow prevention umbrella (3) is provided outside the thrombus retention net (2). A second advance piece (5) is located in the sheath (1) to push and pull the overflow prevention umbrella (3). the overflow prevention umbrella (3) comprises an umbrella surface (32) and an umbrella holder (31) connected between the second advance piece (5) and the umbrella surface (32) ), and the open end of the umbrella surface (32) is a closed memory shape. during filtration of thrombi in the blood vessels, the overflow prevention umbrella (3) is opened by the thrombus retention net (2)； upon completion of filtration, the thrombus retention net (2) returns to the interior of the overflow prevention umbrella (3) and the surface of the overflow prevention umbrella (32) ) will be withdrawn into the center of the retaining door in order to fully cover the retaining door, thus preventing overflowing of plates； the sheath (1) is pushed forward to retract the thrombus retention net (2)； and the overflow prevention umbrella (3) is pulled into the sheath (1). The thrombus filter can effectively recover calcified plaques in blood vessels through the thrombus retention net (2) and the overflow prevention umbrella (3) can effectively prevent thrombus overflow when it is retracted after thrombus capture. 1/1resumo filtro de trombo e método de utilização do mesmo é divulgado, no campo de filtros de vaso sanguíneo, um filtro de trombo compreendendo uma bainha (1), uma rede de retenção de trombo (2) com uma porta de retenção,
