数值研究了引力场中电阻撕裂模不稳定性所引起的磁场重联，结果表明，在电流片长度Ｌ＝１Ｈ、半宽度δ＝Ｈ／２４的情况下，电流片两端附近将出现两个Ｘ线的磁场重联，并形成磁岛和高温高密度的等离子体团．磁岛宽度随着时间而增长，在ｔ≈５５τＡ时达到饱和，最大饱和岛宽约为４δ．同时从ｔ≈３７τＡ开始，磁岛中心位置逐渐下降；在ｔ＝５７τＡ时发生结合不稳定性，磁岛与底部附近的闭合磁场区合并，导致磁场湮灭和磁能的快速释放．另一方面，由于引力场和等离子体非均匀性的影响，顶部附近随时间而增长的等离子体外流速度达１．１４ＶＡ∞；磁岛中等离子体向下运动的最大速度达１．４１ＶＡ∞，且大于局地声速；在磁岛前方可形成快激波．这些结果可用于解释双带耀斑中后随耀斑环的形成、磁场湮灭和磁能释放、以及Ｄｏｐｐｌｅｒ速度图上观测到的红移现象． The magnetic reconnection caused by the instability of the resistive tearing modes in the gravitational field is numerically investigated. The results show that when the current length is L = 1H and the half width is δ = H / 24, two A X-ray magnetic field reconnection, and the formation of magnetic islands and high-temperature high-density plasma group. The magnetic island width increases with time and reaches saturation at t≈55τA, and the maximum saturated island width is about 4δ. At the same time, the central position of the magnetic island gradually decreases from t≈37τA; the instability of binding occurs at t = 57τA, and the magnetic field merges with the closed magnetic field near the bottom, resulting in the annihilation of magnetic field and the rapid release of magnetic energy. On the other hand, due to the influence of gravitational field and plasma inhomogeneity, the plasma outflow velocity near the top increases with time reaches 1.14VA ∞. The maximum velocity of the plasma in the magnetic island reaches 1.41VA ∞, And greater than the local sound velocity; in front of the magnetic island can form a fast shock wave. These results can be used to explain the formation of flare rings, the annihilation of magnetic fields and the release of magnetic energy after double flare, as well as the observed redshift on Doppler velocity maps.