Sliding plug door assembly and vehicle

The invention relates to the technical field of sliding plug doors, in particular to a sliding plug door assembly and a vehicle, according to the sliding plug door assembly, a support is fixedly arranged on a door frame, a second sliding block is fixedly connected with a door plank, a first sliding block drives the second sliding block to move along a first sliding groove, and when the first sliding block moves from a first end to a second end, the door plank is inserted into the door frame and abuts against the door frame. An L-shaped first locking groove is formed in the first sliding block, when the first sliding block slides from the first end to the second end, the first sliding head slides in the third sliding groove and slides towards the joint of the second sliding groove and the third sliding groove, and when the second sliding block reaches the second end, the first sliding block continues to slide in the direction from the first end to the second end, so that the first sliding head is located in th