This is a fishing reel with a line-explosion prevention mechanism, consisting of a reel main body, a rotating spool, and a handle component. The line-explosion prevention mechanism includes a base fixed on the reel main body, a magnet seat capable of relative movement, several magnets fixed in the magnet seat, and a control device driving the magnet seat. The magnet seat's edge forms an installation part where the magnets are arranged, and the base has an air-avoiding groove matching the installation part. This design allows the magnets to be vertically installed, increasing the magnetic force threshold for the same quantity of magnets and improving the performance on the spoo.