Pen with ball pen lead used in various environmental states of gravitational force, air, liquid and the like

The invention discloses a pen with a ball pen lead used in various environmental states of gravitational force, air, liquid and the like, and relates to the field of stationary. The pen comprises a penholder, a pen point, a sealing plug, a first controlling assembly and a second controlling assembly; the first controlling assembly comprises a compressing plate, a telescopic assembly and a pressingswitch; the second controlling assembly comprises a one-way air valve, an air amount controller and an air bag. The pen has the advantages that the problem that a ball pen in the prior art cannot beused in various environmental states of gravitational force, air, liquid and the like at the same time is solved, the problem that the pen lead is restricted is solved so that a user can select the color, viscosity and shade of ink to improve the adaptability of the ball pen, the ball pen lead can be repeatedly replaced, the ball pen lead can be repeatedly used in various environmental states of gravitational force, air, l