The invention provides a wall climbing car specially for water cooled wall thickness measurement, and relates to wall climbing detection equipment. The wall climbing car specially for water cooled wall thickness measurement solves the problems that existing traditional wall climbing equipment can not be applied to the thickness detection of a water cooled wall, and the structure is complex, the volume and mass are large, which makes difficulties in moving and measuring. A first single magnetic wheel is fixedly connected to the upper portion of a main frame body through a first fixing frame, afirst magnetic wheel group is fixedly connected to the rear portion of the main frame body through a second fixing frame, two auxiliary magnetic wheels are respectively fixedly connected on two sidesof the main frame body through an auxiliary fixing frame, a first probe mounting frame and a second probe mounting frame are arranged at the rear portion of the main frame body, each probe mounting frame is provided with two probe magnetic wheels, a first EMAT probe is fixedly installed on the main frame body through the first probe mounting frame, a second EMAT probe is fixedly installed on the main frame body through the second probe mounting frame, and the first single magnetic wheel, the first magnetic wheel group, the auxiliary magnetic wheels and the probe magnetic wheels are all close in contact with the water cooled wall.