Shield tunneling machine with secondary crushing function

The invention discloses a shield tunneling machine with a secondary crushing function, relates to the technical field of shield tunneling machines, and solves the problems that when the shield tunneling machine excavates, soil and stones on the edge of an excavation area are often difficult to excavate, so that a collection position is easily blocked, and when the shield tunneling machine excavates a relatively loose and collapsed area, the collection position is not easily blocked. The soil in the edge area easily collapses and directly falls into the collecting area, so that the problem that part of stones cannot be completely broken and are difficult to pass through the collecting holes easily exists. The shield tunneling machine with the secondary crushing function comprises a cutter head assembly, a front shield assembly is movably arranged on the rear side of the cutter head assembly, and a rear shield assembly is arranged on the rear side of the front shield assembly. Through cooperation of the grindin