Multi-beam resolution and resolution detection method based on trapezoidal target object

The invention discloses a multi-beam resolution and resolution detection method based on a trapezoidal target object, which comprises a reference floating body and a multi-beam instrument, and is characterized in that the reference floating body is a cube with a multi-step structure, and the length of each stage side of the cube from top to bottom is 1cm, 2cm, 5cm, 10cm, 20cm and 40cm. According to the method, the verification of the beam resolution is divided into a horizontal direction and a vertical direction, the multi-beam resolution is a minimum target which can be distinguished and detected by multiple beams, and the multi-beam resolution is a minimum change value which can be distinguished by multi-beam sounding; squares with different specifications are constructed, the height difference in the vertical direction can be used for detecting the resolution value, the size of the square in the horizontal direction can be used for detecting the resolution value, and on the premise that the accuracy of det