The utility model provides a battery atmospheric pressure measuring joint subassembly belongs to chemical power source and holds the battery technology field. Include the utmost point post matched with joint with pressure sensor and battery. Connect include with pressure sensor's the first air vent of measuring head matched with and with utmost point post matched with second air vent, first air vent and second air vent are linked together. It has the first internal thread that closes with the outer thread to match of pressure sensor's measurement to open on the lateral wall of first air vent, and it has the second internal thread that closes with the outer thread to match of utmost point post to open on the lateral wall of second air vent. The utility model discloses simple structure, the design is exquisite, can dock pressure sensor with the utmost point post of battery conveniently, makes things convenient for battery internal pressure's measurement.