Platform height calculation method and lifting control method for scissor type lifting device

The invention provides a platform height calculation method and a lifting control method for a scissor-type lifting device. The scissor-type lifting device comprises a chassis, an arm frame and a platform arranged at the top end of the arm frame. The platform height calculation method comprises the following steps: acquiring a first arm support angle of a pre-calibrated arm support in a storage state and a second arm support angle of the pre-calibrated arm support when the pre-calibrated arm support is lifted to the top; acquiring a real-time boom angle of the boom; and calculating the current height percentage of the platform according to the first boom angle, the second boom angle and the real-time boom angle. According to the platform height calculation method provided by the invention, the calibration operation can be simplified and the operation error can be reduced by acquiring the pre-calibrated first boom angle when the boom is in the storage state and the pre-calibrated second boom angle when the boo