Space pen refill for extravehicular activity

A space pen refill for an extravehicular activity, comprising a ball, a refill body, a fiber rod and a fiber ink-storage tube, wherein the ball is rotatably connected in one end of the refill body, a segment of the ball is exposed outside the refill body, the fiber ink-storage tube is connected to an inside of the refill body, one end of the fiber rod is inserted into the fiber ink-storage tube, and an other end of the fiber rod close to the ball is used to supply ink for the ball;

• an end face of an other end of the refill body is connected with a first one-way valve and a second one-way valve, the first one-way valve and the second one-way valve are unidirectionally communicated with the inside of the refill body and an outside of the refill body, and a gas flow direction in the first one-way valve is opposite to a gas flow direction in the second one-way valve.