Abstract: Can we correctly interpret the features of continental geology by the plate-tectonic theory based on the results of the marine geological surveys and some geophysical studies? What are the trend of development and future of palate tectonics? This is a question of common interest to us. The "classic" plate-tectonic theory is facing the problems in interpreting the lengthy and complex continental crustal geology. The following problems are discussed by the author: （1） what geological periods are suited to be interpreted from the view-point of plate tectonics; （2） subdivision of a plate, time of plate motion and tectonic settings; （3） problems of subauction zones; （4） mobile belts in the interior of plates; （5） plate and geosyncline. Though this theory does not illustrate all the features of continental crust, it still has great vitality and represents the advance of earth science. The author thinks that under the guidance of the concept of plate tectonics we should look for more flexible and subsidiary models in order to perfect this theory. The following models are discussed: （1） model of mantle plume; （2） model of A-type subduction; （3） model of structural-stratigraphic terranes; （4） model of earth expansion and pulsation. Finally, six conclusions and suggestions are proposed.