A container grinding system having a box equipped with a closing device coupled to a first safety device, the box having a container introduction opening arranged in a top part of the box and capable of being closed by the closing device, the grinding system having a grinder having at least one grinding shaft for shredding chipped containers, a filtering basket recovering the ground material from the grinding of containers, and a set of rinse nozzles, the grinding system being configured so that following the introduction of a container into the box for grinding the same, the first safety device inhibits the operation of the grinder as long as the closing device does not ensure closing of the box.