‘Ganke No.4’ is a new pepper F₁ hybrid developed by crossing two inbred lines ‘P921’ as female parent and ‘P926’ as male parent．It is of extreme early maturity．It has shorter growing period and is specially for multiple cropping．It is easy for cultivation in protected fields．Its fruit is of horn shape with many wrinkles，about 22-25 cm in length，3 cm in width，and 0.3 cm in flesh thickness．The single fruit weight is 45-50 g．It can bear fruit concentrately and yield highly．It has strong and hot taste．Its quality is good．In fields，its resistance to Phytophthora blight is equivalent to that of the contrast ‘Longjiao No.2’ and obviously stronger than that of the contrast‘ Qicunhong’．Its resistance to virus disease is equivalent to these 2 contrasts．It can yield about 60 t ·hm^-2．It is suitable for multiple cropping in protected fields in Gansu Province and homogeneous ecological zones in China．