In this paper, the 3B flare of February 4, 1986 is studied comprehensively. The escape electrons accelerated to 10–100 keV at the top of coronal loop are confirmed by III type bursts. The energetic electron beams moved downward trigger the eruptions in the low layer of solar atmosphere. The radio and soft X-ray bursts are interpreted, respectively, by the maser mechanism and evaporation effect. Finally, the important role of energetic electron beams in solar flares is pointed out. This is a preview of subscription content, log in to check access. Buy single articleInstant access to the full article PDF. Price includes VAT for USAAxisa, F.et al.: 1973,Solar Physics 29, 163.Dulk, G. A.: 1983,Solar Physics 86, 452. Emslie, A. G.: 1978,Astrophys. J. 224, 241. Emslie, A. G.: 1980,Astrophys. J. 235, 1055. Hudson, H. S. and Dwived, B. N.: 1982,Solar Physics 76, 45. Ji Shucken: 1988,Kexue Tongbao 13, 1102. Lin, H. A.et al.: 1986,Chinese Solar-Geophysical Data, Special Issue1, 74. Machado, M. E., Emslie, A. G. and Brown, J. C.: 1978,Solar Physics 58, 363.Melrose, D. B.: 1980,Space Science Reviews 26, 3.Malville, J. M: 1962,Astrophys. J. 135, 834.Spicer, D. S.: 1977,Solar Physics 53, 305.Teske, R. G., Soyumer, T. and Hudson, H. S.: 1971,Astrophys. J. 165, 615. Wang, J. L.et al.: 1986,Chinese Solar-Geophysical Data, Special Issue1, 1. About this articleCite this articleJi, S., Ding, Y., Chen, G. et al. Radio and soft X-ray investigation of the solar flares of February 4, 1986. Astrophys Space Sci 203, 241–246 (1993). https://doi.org/10.1007/BF00658992- Electron Beam- Solar Flare