Numerical control ultrahigh pressure water jet cutting machine

The invention relates to the technical field of water jet cutting, in particular to a numerical control ultrahigh pressure water jet cutting machine which comprises a shell and a water jet cutting mechanism installed on the upper end face of the shell. A plurality of fixed plates are fixedly installed at an end opening of the upper end of the shell, and a plurality of movable plates are movably installed on the upper end face of each fixed plate in the vertical direction through elastic mechanisms; a guide plate parallel to the fixed plate is fixedly arranged above each fixed plate, a plurality of sets of limiting rod pieces are inserted into the upper end face of each guide plate in a sliding manner along the two sides, and every two limiting rod pieces sliding in the same straight line direction along the two sides form one set; and the movable plates drive the limiting rod pieces to move downwards together when bearing water flow impacting downwards from the guide plates, the limiting rod pieces comprise s