The heavy rain in the southeasterly jet in the low-level occurs less in Hubei Province. A mesoscale analysis of this kinds of heavy rain occurred on 4th-5th of June, 2004 in east-central part of Hubei Province is conduced with the satellite pictures, Doppler radar data and surface mesoscale observations. It was found that (1) the heavy rain was produced in the favorable scale background and the special region. (2) The low-level jet plays an important role in the development of the heavy rain. (3) The heavy rain was directly produced by the meso-scale echo mass and complex ; (4) the meso-scale system was one of the most directly affection systems of the heavy rain.