The invention discloses an internal pressure intensity detection device for a natural gas storage tank. The internal pressure intensity detection device comprises the storage tank, an alarm lamp, nut holes, a hook, a leakage-proof detection lamp, an instrument panel, a regulation and control ring, a connecting rod, a temperature detection instrument, a leakage-proof leather sheath, screw holes and a guide pipe. The internal pressure intensity detection device is wide in application range, low in cost, convenient to mount and extremely high in treatment performance and has the good popularization effect. During use, the device is fixedly connected to the guide pipe, the instrument panel is regulated, and detection is carried out. Through the arrangement of the leakage-proof leather sheath, natural gas during detection is effectively prevented from being leaked, and the use safety of the device is guaranteed. The temperature detection instrument is mounted and used for detecting the temperature of the storage temperature of the storage tank, when the temperature of the storage temperature is too high and danger exists, the position of the storage tank can be moved, and device practicality is increased. Through the arrangement of the alarm lamp, when the internal pressure intensity of the storage tank is normal, the alarm lamp is green; when the internal pressure intensity of the storage tank exceeds the standard, the alarm lamp flickers, and an alarm is given; and device multifunctionality is achieved.