The influencing factors to the passing capacity issue of screw pump in directional wells are pump length, casing size and dogleg angle, wherein casing size and dogleg angle is immutable. On the premise of no change in pump length, an axial force is applied to an end of pump, forcing the pump flexural deformation to increase pump passing capacity. The theoretical analysis to this squeeze pump method has been done, and then the calculation model of the pump through the dogleg is built, under specific conditions the maximum allowed value of pump setting depth is derived, in the calculation model, considering the impact of bending of pump on stator rubber structure. Case studies show that, some dogleg cannot be through merely under the weight of the pump can be through by adopt the method of squeeze pump, according to the calculation results can determined the maximum allowed value of pump depth, while avoiding stator rubber being snapped and degumming in the squeeze process.