The invention discloses a riding standing type motor vehicle with functions of changing the speeds and the directions according to standing posture of human bodies. The riding standing type motor vehicle comprises a front driving bottom plate, a rear driving bottom plate and a middle driving bottom plate. First connectors are arranged at two ends of the rear driving bottom plate, a first driving shaft is arranged in the first connectors, travel wheels are arranged at two ends of the first driving shaft, transmission tooth openings are formed in the first driving shaft, and a power unit is connected onto the transmission tooth openings; a carrier, a control device, a corner determining device and a speed change control device are arranged on the middle driving bottom plate; a steering groove is formed in the front driving bottom plate, second connectors are arranged on the front driving bottom plate, steering shafts are arranged in the second connectors and are provided with steering wheels and steering tooth openings, steering rotors are arranged on the corner determining device, and sensing units are arranged on the steering rotors. The riding standing type motor vehicle with thenovel mechanical structure has the advantages that the speeds and the directions of the riding standing type motor vehicle can be changed according to posture of drivers and passengers, accordingly, the use performance of the riding standing type motor vehicle can be greatly improved, the riding standing type motor vehicle is good in safety use performance, and actual use requirements can be met.