The invention discloses a bottle cap sealing machine used for bottled food. The bottle cap sealing machine comprises a supporting framework. An operating platform is fixed to the inner surface wall ofthe supporting framework, and buffering grooves are formed in the upper surface of the operating platform at equal intervals. Limiting blocks are fixed to the edges of openings in the upper ends of the buffering grooves correspondingly, and elastic plates are arranged on the inner surfaces of the limiting blocks correspondingly. An upper hydraulic cylinder is connected with a transmission rod through a hydraulic telescopic rod, and a mounting plate is welded to the bottom of the transmission rod. Motors are arranged on the upper surface of the mounting plate and are in transmission connectionwith clamping plates through rotary shafts correspondingly. Balance supporting bars are symmetrically arranged on the two sides of the upper surface of each clamping plate. Lower hydraulic cylindersare symmetrically arranged on the two sides of the interior of each clamping plate and connected with pressurizing plates through hydraulic telescopic rods correspondingly. Buffering cushion blocks are symmetrically fixed to the lower surfaces of the two sides of each clamping plate. According to the bottle cap sealing machine used for the bottled food, the bottle cap sealing machine is simple andreasonable in overall structural design, quick and safe sealing operation is achieved, operation is safe and efficient, and the practicability is high.