1. A badminton racket, comprising: a frame; a grip, comprising: a gripping portion having a front end; a sleeved portion connected to the front end of the gripping portion, the sleeved portion having a first top surface and a first opening, the first opening being located on the first top surface, the interior of the gripping portion and the sleeved portion communicating with each other to form a hollow structure; and a fastening element connected to the first top surface and extending from the first opening to the interior of the gripping portion; a cap sleeved on the sleeved portion of the grip, the cap having a second top surface and a second opening, the second opening being located on the second top surface (31; and a shaft, one end of the shaft being connected to the frame, the other end being inserted into the fastening element through the second opening and the first opening sequentially, characterized in that, the first top surface and the second top surface having a spacing length therebetween, the cap having a cap length, and the ratio of the spacing length to the cap length being between 0.39 and 0.83. a frame; a grip, comprising: a gripping portion having a front end; a sleeved portion connected to the front end of the gripping portion, the sleeved portion having a first top surface and a first opening, the first opening being located on the first top surface, the interior of the gripping portion and the sleeved portion communicating with each other to form a hollow structure; and a fastening element connected to the first top surface and extending from the first opening to the interior of the gripping portion; a cap sleeved on the sleeved portion of the grip, the cap having a second top surface and a second opening, the second opening being located on the second top surface (31; and a shaft, one end of the shaft being connected to the frame, the other end being inserted into the fastening element through the second opening and the first opening sequentially, characterized in that, the first top surface and the second top surface having a spacing length therebetween, the cap having a cap length, and the ratio of the spacing length to the cap length being between 0.39 and 0.83. a gripping portion having a front end; a sleeved portion connected to the front end of the gripping portion, the sleeved portion having a first top surface and a first opening, the first opening being located on the first top surface, the interior of the gripping portion and the sleeved portion communicating with each other to form a hollow structure; and a fastening element connected to the first top surface and extending from the first opening to the interior of the gripping portion; a cap sleeved on the sleeved portion of the grip, the cap having a second top surface and a second opening, the second opening being located on the second top surface (31; and a shaft, one end of the shaft being connected to the frame, the other end being inserted into the fastening element through the second opening and the first opening sequentially, characterized in that, the first top surface and the second top surface having a spacing length therebetween, the cap having a cap length, and the ratio of the spacing length to the cap length being between 0.39 and 0.83.