Pressure-dip angle type sediment thickness tester and thickness testing method thereof

The invention discloses a pressure-dip angle type sediment thickness tester and a thickness testing method thereof. A sediment probe of the sediment thickness tester comprises a motor assembly, a probe assembly and a probe circuit board, wherein a motor of the motor assembly is fixed on a bearing block, the power output end of the motor is connected with a first gear shaft arranged above the bearing block, a first gear is meshed with a second gear, arranged above the bearing block, of the probe assembly, a screw rod bearing part of the probe assembly is fixed on the bearing block, a control unit in the probe circuit board receives a control signal of a ground mainframe and transmits a motor working current signal and a dip angle signal sensed by a dip angle sensor to the ground mainframe, relative change of the motor working current is equivalent to the relative change of pressure born by the probe, and the ground mainframe displays a pressure-probe extension length curve and a dip angle-probe extension lengt