本文叙述了ＨＬ－１Ｍ装置上利用偏压电极、弹丸注入和分子束注入改善等离子体能量约束的放电实验。在相同放电条件下，把上述放电的能量约束特性与简单欧姆放电的相比较，发现此类放电能量约束时间明显增加，等离子体电流分布剖面发生明显变化，并给出了Ｌ模能量约束时间与密度的定标关系。 This article describes the discharge experiments using the bias electrode, projectile injection and molecular beam injection to improve the plasma energy constraint on the HL-1M device. Under the same discharge conditions, compared with the simple ohmic discharge, the energy confinement characteristics of the above discharges are found to increase obviously, and the plasma current distribution profile changes obviously. The energy confinement time of L-mode and The calibration of density.