In order to enhance oil recovery in fracturing sections with a small fracturing scale，low fracture network permeability，and abundant reserves，the temporary plugging enhancing water injection huff and puff technology is proposed. The technology expands the swept area of injected water by injecting temporary plugging agents during water injection huff and puff，thus improving the water injection huff and puff development effect of horizontal wells after several cycles. In this paper，core samples with different fracture apertures are connected in parallel to comparatively analyze the producing ratio of the crude oil in the core samples with different fracture apertures during water injection huff and puff and temporary plugging enhancing water injection huff and puff.Then，experiments are carried out to explore the plugging characteristics of filter cake of the temporary plugging agents，and a mathematical model of temporary plugging and diversion for horizontal wells is established by considering the variable mass flow in the wellbore，so as to study the influence of temporary plugging agents’mass concentration and injection rate on diversion efficiency.Results show that temporary plugging enhancing water injection huff and puff can enhance oil recovery of the core samples with a large fracture aperture and a small fracture aperture by 3.46% and 1.71%，respectively，thus improving the development effect of the water injection huff and puff.According to the relationship between the pressure drop through the filter cake of the temporary plugging agents and the injection time，the drag coefficient of the filter cake is determined to be 1.13×108 m?2. In addition，higher temporary plugging agents’mass concentration and injection rate indicate higher diversion efficiency.