The invention relates to the field of wall-climbing robots, in particular to a negative pressure adsorption type biomimetic wall-climbing robot. The negative pressure adsorption type biomimetic wall-climbing robot comprises a skeleton, walking devices, an adsorption device, a control circuit, four pressure sensors, a stepping motor and an ultrasonic wave sensor, wherein the walking devices are installed at the two sides of the skeleton and used for the wall-climbing robot to move; the adsorption device comprises a mini vacuum pump, four adsorption plates and air valves, and the adsorption device is used for the wall-climbing robot to be adsorbed on a wall face; the control circuit comprises a shell, a PCB plate, a CPU, a servomotor controller, an electromagnetic valve, a voltage stabilizing circuit, an LED state indicator lamp, a wireless transmission module, an antenna, a dial switch and a tilt angle sensor, and the control circuit is installed in the middle on the skeleton and used for controlling and adjusting the working state of the wall-climbing robot. The negative pressure adsorption type biomimetic wall-climbing robot is strong in environmental adaptation, high in intelligent degree, strong in loading capacity, good in stability and capable of allowing to simultaneously control the work of multiple wall-climbing robots and improving the working efficiency.