The invention relates to a method for preventing an automotive power sunroof from being clamped. The existing method has the disadvantages of low precision, difficult installation, high cost and short service life. The method comprises: firstly, initializing a controller and a drive system of the power sunroof to obtain a travel N and an average output force F0 of a motor; secondly, performing operation according to the button input of the user or an instruction of an LIN bus; if the instruction is 'open', allowing the motor to start to rotate positively; and if the instruction is 'close', allowing the motor to start to rotate reversely. In the process of 'closing', if the sunroof is not closed completely, an instant output force Fn of the motor is calculated; if Fn is more than or equal to F0, the variation of an output force delta F is calculated; and if delta F is more than or equal to an anti-clamping threshold value H, the motor is started to rotate reversely. The anti-clamping threshold value of the method is adjustable and flexible; the sunroofs is positioned accurately according to position signals so as to open or close the sunroof completely; and the method has high precision and rapid speed for preventing the automotive power sunroof from being clamped.