The invention discloses a movable pump 
station of emulsified liquid for mine, with a function of preventing water overflow. An emulsification 
oil tank, a pressure-reduction water tank, a water pump, an 
oil tank, a one-way valve and a combined valve body are arranged on a base plate, wherein a ball float valve with the function of automatic water feeding is arranged in the pressure-reduction water tank. The movable pump 
station is characterized by further comprising a water blocking valve connected to the water inlet of the ball float valve; a three-way valve is connected to a high-pressure pipeline of the pump 
station; the structure of the water blocking valve lies in that a pressure spring and a 
piston rod are arranged in a valve cavity; the top of the upper cavity of the water blocking valve is connected with a 
tap water pipe, the lateral side of the upper cavity is communicated with the ball float valve, and the bottom of the lower cavity is connected with the three-way valve. When the pump station reaches a rated 
working pressure to stop working, the 
hydraulic pressure in the high-pressure pipeline enters into the lower cavity of the water blocking valve through the three-way valve, the 
piston rod is pushed to overcomes the resistance of the pressure spring to move upwards, and the 
tap water outlet of the upper cavity is blocked, so that the 
tap water entering the ball float valve is 
cut off, and the water is prevented from overflowing the pressure-reduction water tank.