The invention discloses a portable illuminating lamp. The portable illuminating lamp comprises a handheld assembly, a shell mounted on the handheld assembly and provided with a mounting groove, a battery assembly arranged at the bottom of the mounting groove, and a light emitting assembly connected with the shell; the light emitting assembly and the battery assembly are electrically connected; thebattery assembly comprises a battery body arranged at the bottom of the mounting groove and a battery pressing plate fixedly connected with the inner wall of the mounting groove; and the battery pressing plate is connected with the battery body in an abutting mode. The battery body is placed at the bottom of the mounting groove, the battery pressing plate is connected with the battery body in theabutting mode while being connected with the inner wall of the mounting groove, that is, the battery body is arranged between the battery pressing plate and the bottom of the mounting groove in a pressed mode, thus during using of the portable illuminating lamp, the battery body is not loosened, that is, a collision with the inner wall of the mounting groove during using of the battery body is also avoided, the stability of the battery body during using is improved, the damage risk of the battery body is lowered, the reliability of the battery assembly during using is ensured, and the servicelife of the portable illuminating lamp is prolonged.