The utility model discloses a thin water smoke fire extinguisher of portable high pressure, including open -top's casing, at the open -top of casing department installation top cap, the elasticity water pocket in the casing is installed in the top cap lower part, is filled with high -pressure gas between casing and elasticity water pocket, and at the built -in water of elasticity water pocket, the outer control valve of casing is installed on top cap upper portion, and nozzle on control valve rivers passageway and the delivery port of elasticity water pocket in through the control valve communicates with each other, rivers passageway acquiescence for off -state, for the on -state behind the switch module on opening the control valve. The utility model discloses a thin water smoke fire extinguisher of portable high pressure has avoided built -in water and casing direct contact on the one hand, and the fire extinguisher casing need not use special stainless steel material or surface treatment technology, the cost is reduced and weight, this fire extinguisher of on the other hand is the thin water smoke of single -phase stream, does not need the reaeration after the use, can reuse, reduced the maintenance cost.