The invention relates to a pitching lifting mechanism for body scanning examination. The pitching lifting mechanism is mainly applied to a body back scattered X-ray examination device. The pitching lifting mechanism for body scanning examination comprises a main frame, a scanning platform assembly, a front driving assembly, a rear driving assembly and a weight assembly. The scanning platform assembly can conduct rotation motion and linear motion relative to a hinge pin of the front driving assembly and the scanning platform assembly can conduct rotation motion relative to a hinge pin of the rear driving assembly; under the condition that the front driving assembly and the rear driving assembly are commonly driven by a motor, pitching lifting composite motion of the scanning platform assembly is achieved through adjustment of speed of the motor. According to the pitching lifting mechanism for body scanning examination, the advantages of a head-swinging type lifting mechanism and the advantages of a vertically-lifting type lifting mechanism are combined, so that the image examination quality is improved and the examination efficiency is improved.