The utility model provides an anti-expansion plastic container which comprises a
barrel body, the top of a sealing cover is communicated with an air outlet
pipe, a sliding column is arranged in the air outlet
pipe in a sliding mode, a sealing
piston is fixed to the bottom of the sliding column, a supporting plate is fixed to the top of the sliding column, a spring is arranged on the sliding column in a sleeved mode, and an air outlet hole is formed in one side of the air outlet
pipe. One end of the spring is fixed to the air outlet pipe, the other end of the spring is fixed to the supporting plate, a pointer is fixed to one side of the supporting plate, a side base is fixed to the sealing cover, a scale groove is formed in the side base, a pair of semi-ring plates are symmetrically arranged on the two sides of the
barrel body, and two supporting legs are fixed to one side of each pair of semi-ring plates. The plastic container solves the problems that when an existing plastic container is used, air pressure inside the plastic container can be increased, the plastic container expands, if the plastic container is not treated in time, the plastic container is prone to deformation, and if the plastic container is serious, the plastic container expands and bursts.