Dry powder puncture valve

The utility model discloses a dry powder puncture valve which comprises a valve body, a valve rod assembly extending up and down is installed in the valve body, a puncture needle extending up and down is fixed at the lower end of the valve rod assembly, a transverse channel and a vertical channel which are communicated with each other are arranged in the valve body, and the valve rod assembly penetrates through the vertical channel. The valve rod assembly comprises a lower valve rod and an upper valve rod fixed to the upper end of the lower valve rod, a groove with an upward opening is formed in the upper end of the lower valve rod, the lower end of the upper valve rod is sleeved with a sealing gasket, a sealing block and a spring which are sequentially distributed from top to bottom, and the spring is contained in the groove and clamped between the bottom of the groove and the lower end of the sealing block. The outer wall of the upper end of the sealing block makes contact with the inner wall of the taper h