The invention discloses a positioning device of a cabinet body, comprising a lateral chassis, wherein the lateral chassis is connected with an upright chassis through an articulated shaft of the chassis vertically arranged, and a traveling wheel is installed below the lateral chassis and below the upright chassis; one end of the upright chassis close to the transverse chassis is hingedly connectedwith a upright pendulum swing table, and a upright pendulum force applying cylinder is connected between the upright pendulum swing table and the upright chassis; one end of the transverse chassis close to the vertical chassis is hingedly connected with a transverse support swing table, and a transverse swing force applying cylinder is connected between the transverse support swing table and thetransverse chassis; the vertical pendulum force applying cylinder and the yaw force applying cylinder are connected with a hydraulic oil supplying device; the invention realizes the conversion of theupright position and the lateral position of the cabinet body through a vertical pendulum force applying cylinder and a yaw force applying cylinder, adopts more mechanical operations in the whole process, reduces the human output, and improves the safety of the cabinet body in place.