Fracturing, acidizing and chemical injection are the traditional technologies for enhancing permeability and removing plugging in offshore oil and water wells. But, there are some problems such as complex process, high capital cost and secondary damage to reservoir. The controllable shockwave technology, as an emerging reservoir reconstruction technology, will not destroy the wellbore structure and also has the characteristics of good permeability enhancement and plug removal effect and controllable energy. Based on the analysis of the generation mechanism of the controllable shockwave, the controllable shockwave experimental device is developed. With the wellbore and small core scale samples taken as the research objects, the reservoir and engineering environment are simulated to carry out the evaluation experiment for controllable shockwave permeability enhancement and plug removal effect. The results show that the controlled shockwave has a good effect on the two scale samples of wellbore and small core. The samples of wellbore scale have obvious macro fractures, the rock strength is reduced, and the permeability of the samples of small core scale is increased by 13.3%~57.9%, so as to realize the permeability enhancement. The controllable shock wave has obvious effect on removing solid invasion, inorganic scale and polymer plugging of small core scale samples. The dimensionless permeability increases between 0.12 and 0.27, and the most significant effect is to remove solid invasion damage. The shockwave makes the plug inside and outside the seepage channel vibrated, pushed and peeled off, so as to realize the plug removal. The controllable shockwave technology has obvious effect on increasing permeability and removing plug. The research results lay a solid foundation for the field application of controllable shockwave permeability enhancement and plug removal technology.